Thanx Alex. In that table everything is OK ' according to levels of content (3, c, etc)

I'm fully understand that only one table is not enough. it all or nothing.

Copying was an instrument to discover when it starts to be broken. And I've find it: In profiles. And I do isolate one single profile wich was the troublemaker. after it's deletion everything came back to good. 

This profile was affected during New Membership Level creation process. Now, (after backups:)) I'm going to try it once again. I'll keep you posted about:)