You've got a lot of reading (FAQs, docs) and searching to do.
Short answer is you're running redundant software. If you want to run Mame32 you don't need Mamewah and vice-versa. If you DO want to use Mamewah, switch to compatible emulators (in your examples FCEU, Fusion and Mame).
Check out jcrouse's page for Mamewah .ini files.