fix case where there are multiple multiband amps matching the sub amp… #433

Job	Run time
Tests on other platforms (windows-2019, 3.10)	5m 2s
Tox test (py38)	3m 49s
Tests on paywalled platforms	0s
Tests on other platforms (windows-2022, 3.11)	4m 43s
Tox test (py39)	3m 36s
Tests on other platforms (windows-2022, 3.12)	4m 35s
Tox test (py310)	3m 36s
Tests on other platforms (macos-13, 3.12)	6m 51s
Tox test (py311)	3m 28s
Tests on other platforms (macos-14, 3.12)	1m 49s
Tox test (py312-cover)	6m 40s
Tox test (docs, graphviz)	1m 41s
Docker image	0s
PyPI packaging	0s
	45m 50s

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