Thanks for your feedback.

You can disable asking for saving password in extension popup (click on extension icon in browser’s action bar and then uncheck relevant checkbox). It should work generally for all domains and subdomains of the site.
If it doesn’t work please let us know on which domain/site. We will verify the issue and fix it.
For password generator issue it seems that for some reason we are wrongly identifying login dialog as registration and that is causing putting password generator to inappropriate field. Please let us know the site where we are causing such issues and we will fix it as well.
We will also consider the option with disabling password generator feature for certain sites.