Admins cannot modify records

To answer your question, no, that is not by design and must be something with your site. Maybe some permissions are messed up somewhere, or a conflict with another plugin that also created a “member” custom post type?

Also, please note that this is NOT the support forum. You are posting in the feature request forum. I’m guessing you didn’t check the general support forum first, and see this bold sticky post:
https://stephensherrardplugins.com/support/topic/please-read-before-posting/

I’m trying to keep support organized in one location instead of scattered around multiple forums and topic. The free plugins already have their own support forum at WordPress.org.