Don't check for stored URLs if not storing

src/wp-to-twitter-shorteners.php

@@ -33,7 +33,7 @@ function wpt_shorten_url( $url, $post_title, $post_ID, $testmode = false, $store
 		// filter link before sending to shortener or adding analytics.
 		$shortener = get_option( 'jd_shortener' );
 		// if the URL already exists, return it without processing.
-		if ( wpt_short_url( $post_ID ) ) {
+		if ( wpt_short_url( $post_ID ) && $store_urls ) {
 			$shrink = wpt_short_url( $post_ID );
 
 			return $shrink;