I see what you mean. It will remove from the filter but it won't make sense to allow select these groups in the Groups To Include setting, the one where you select which user groups will have their members displayed in the app so I will remove from both.
Can't reproduce this, at least in the newest version:
The only reason for this happen is all your members have the same joined date. Was them imported?
Done.
No, I changed it to work using LIKE, so if you type RICHARD, will return all users having RICHARD in any part of the member name. If I do this, will return only the one you select. That's how it is now:
Searched by "3242".