diff --git a/clams/app/__init__.py b/clams/app/__init__.py
index eeeb01b..fed37e9 100644
--- a/clams/app/__init__.py
+++ b/clams/app/__init__.py
@@ -194,8 +194,8 @@ def sign_view(self, view: View, runtime_conf: Optional[dict] = None) -> None:
         # TODO (krim @ 8/2/23): once all devs understood this change, make runtime_conf a required argument
         if runtime_conf is None:
             warnings.warn("`runtime_conf` argument for ClamsApp.sign_view() will "
-                          "no longer be optional in the future. Please just pass "
-                          "`runtime_params` from _annotate() method.",
+                          "no longer be optional in the future. Please pass `runtime_params` "
+                          "from _annotate() method.",
                           FutureWarning, stacklevel=2)
         view.metadata.app = self.metadata.identifier
         if runtime_conf is not None:
@@ -204,8 +204,6 @@ def sign_view(self, view: View, runtime_conf: Optional[dict] = None) -> None:
             else:
                 conf = runtime_conf
             view.metadata.add_parameters(**{k: str(v) for k, v in conf.items()})
-            # TODO (krim @ 8/2/23): add "refined" parameters as well 
-            #  once https://github.com/clamsproject/mmif/issues/208 is resolved
         
     def set_error_view(self, mmif: Union[str, dict, Mmif], runtime_conf: Optional[dict] = None) -> Mmif:
         """
diff --git a/clams/mmif_utils/rewind.py b/clams/mmif_utils/rewind.py
index 63bb3ea..2985393 100644
--- a/clams/mmif_utils/rewind.py
+++ b/clams/mmif_utils/rewind.py
@@ -6,44 +6,27 @@
 import mmif
 
 
-def is_valid_choice(choice):
-    try:
-        ichoice = int(choice)
-        if 0 <= ichoice:
-            return ichoice
-        else:
-            raise ValueError(f"\nInvalid argument for -n. Please enter a positive integer.")
-    except ValueError:
-        raise argparse.ArgumentTypeError(f"\nInvalid argument for -n. Please enter a positive integer.")
-
-def user_choice(mmif_obj:mmif.Mmif) -> int:
+def prompt_user(mmif_obj: mmif.Mmif) -> int:
     """
     Function to ask user to choose the rewind range.
-
-    :param mmif_obj: mmif object
-    :return: int option number
     """
 
     ## Give a user options (#, "app", "timestamp") - time order
     n = len(mmif_obj.views)
     i = 0  # option number
+    aname = ""
+    a = 0
     # header
-    print("\n" + "{:<4} {:<30} {:<100}".format("num", "timestamp", "app"))
-    for view in mmif_obj.views:
-        option = "{:<4} {:<30} {:<100}".format(n-i, str(view.metadata.timestamp), str(view.metadata.app))
-        print(option)
+    print("\n" + "{:<8} {:<8} {:<30} {:<100}".format("view-num", "app-num", "timestamp", "app"))
+    for view in reversed(mmif_obj.views):
+        if view.metadata.app != aname:
+            aname = view.metadata.app
+            a += 1
         i += 1
+        print("{:<8} {:<8} {:<30} {:<100}".format(i, a, str(view.metadata.timestamp), str(view.metadata.app)))
 
     ## User input
-    while True:
-        choice = int(input("\nEnter the number to delete from that point by rewinding: "))
-        try:
-            if 0 <= choice <= n:
-                return choice
-            else:
-                print(f"\nInvalid choice. Please enter an integer in the range [0, {n}].")
-        except ValueError:
-            print("\nInvalid input. Please enter a valid number.")
+    return int(input("\nEnter the number to delete from that point by rewinding: "))
 
 
 def rewind_mmif(mmif_obj: mmif.Mmif, choice: int, choice_is_viewnum: bool = True) -> mmif.Mmif:
@@ -92,24 +75,32 @@ def describe_argparser():
 
 
 def prep_argparser(**kwargs):
-    parser = argparse.ArgumentParser(description=describe_argparser()[1], formatter_class=argparse.RawDescriptionHelpFormatter, **kwargs)
-    parser.add_argument("mmif_file", nargs=1, help="Path to the input MMIF file, or '-' to read from stdin.")
-    parser.add_argument("-o", '--output', default=None, metavar="PATH", help="Path to the rewound MMIF output file. When not given, the rewound MMIF is printed to stdout.")
-    parser.add_argument("-p", '--pretty', action='store_true', help="Pretty-print rewound MMIF. True by default")
-    parser.add_argument("-n", '--number', default="0", type=is_valid_choice, help="Number of views to rewind (default: interactive mode)")
-    parser.add_argument("-m", '--mode', choices=['app', 'view'], default='view', help="Number of views to rewind (default: interactive mode)")
+    parser = argparse.ArgumentParser(description=describe_argparser()[1], 
+                                     formatter_class=argparse.RawDescriptionHelpFormatter, **kwargs)
+    parser.add_argument("mmif_file", 
+                        help="Path to the input MMIF file, or '-' to read from stdin.")
+    parser.add_argument("-o", '--output', default=None, metavar="PATH", 
+                        help="Path to the rewound MMIF output file. When not given, the rewound is printed to stdout.")
+    parser.add_argument("-p", '--pretty', action='store_true', 
+                        help="Pretty-print rewound MMIF")
+    parser.add_argument("-n", '--number', default="0", type=int,
+                        help="Number of views or apps to rewind, must be a positive integer. "
+                             "If 0, the user will be prompted to choose. (default: 0)")
+    parser.add_argument("-m", '--mode', choices=['app', 'view'], default='view', 
+                        help="Choose to rewind by number of views or number of producer apps. (default: view)")
     return parser
 
 
 def main(args):
-    mmif_obj = mmif.Mmif(sys.stdin) if args.mmif_file[0] == '-' else mmif.Mmif(open(args.mmif_file[0]).read())
+    mmif_obj = mmif.Mmif(str(sys.stdin)) if args.mmif_file[0] == '-' else mmif.Mmif(open(args.mmif_file).read())
 
-    if args.number == 0: # If user doesn't know how many views to rewind, give them choices.
-        choice = user_choice(mmif_obj)
+    if args.number == 0:  # If user doesn't know how many views to rewind, give them choices.
+        choice = prompt_user(mmif_obj)
     else:
         choice = args.number
+    if not isinstance(choice, int) or choice <= 0:
+        raise ValueError(f"Only can rewind by a positive number of views. Got {choice}.")
 
-    
     if args.output:
         # Check if the same file name exist in the path and avoid overwriting.
         output_fp = P(args.output)
@@ -132,4 +123,3 @@ def main(args):
     parser = prep_argparser()
     args = parser.parse_args()
     main(args)
-
diff --git a/requirements.txt b/requirements.txt
index d4bfb0c..bc98c54 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-mmif-python==1.0.8
+mmif-python==1.0.9
 
 Flask>=2
 Flask-RESTful>=0.3.9
diff --git a/tests/test_clamsapp.py b/tests/test_clamsapp.py
index 09b2297..6111bbd 100644
--- a/tests/test_clamsapp.py
+++ b/tests/test_clamsapp.py
@@ -247,7 +247,12 @@ def test_refine_parameters(self):
         self.app.metadata.add_parameter('param3', 'third_param', 'boolean', default='f')
         self.app.metadata.add_parameter('param4', 'fourth_param', 'integer', default='1', choices="1 2 3".split())
         self.app.metadata.add_parameter('param5', 'fifth_param', 'number', default='0.5')
-        conf = self.app._refine_params(param1='okay', non_parameter='should be ignored')
+        dummy_params = {'param1': 'okay', 'non_parameter': 'should be ignored'}
+        conf = self.app._refine_params(**dummy_params)
+        # should not refine what's already refined
+        double_refine = self.app._refine_params(**conf)
+        self.assertTrue(clams.ClamsApp._RAW_PARAMS_KEY in double_refine)
+        self.assertEqual(double_refine, conf)
         conf.pop(clams.ClamsApp._RAW_PARAMS_KEY, None)
         self.assertEqual(len(conf), 5)  # 1 from `param1`, 4 from default value
         self.assertFalse('non_parameter' in conf)