Everything seems correct - the current ModuleId is 434 (verified through Url of the Settings page), the group 2 is linked to module 434, and group 2 contains forum with id=2 that has 8 messages to moderate, 8 threads linked to it each having one message, When opening the Forum itself, the Url contains forumid=2 parameter that matches the above. Going to Moderation results - Url contains parameter mid=434 that also matches the above. When hovering Post Queue on Moderate page, it also offers to do a postback of control dnn$ctr434$MCP$MCPMenu$cmdModQueue I can also see the 2nd Forum module in recycle bin. Maybe its indeed a problem of configuration since everything is fine in DB? Can that be that my Host account can not moderate?

Worked! I logged in as website admin, went to the Forum Moderation and saw the forum in the Post Queue page. I was able to go inside and see individual posts as well there. After that I tried signing out and signing back in as Host - it still worked - showed the forum with the messages inside. I then tried to restart the application and sign in as host again - it still seem to work.

But it was not that way before, I am pretty sure...  Signing in as site admin changed something letting the forum to work.

Thank you very much for your help resolving the issue!