Looking at the code, it appears that permissions were imported, but the permissions cache was not updated with the changes. If you view the usergroup edit view, the permissions should be updated correctly.
The moderation error is a known issue, already fixed for the next build. The page just shows a list of pages with pending edits. To actually approve an edit, you need to visit the article's history tab directly.
The cache rebuild after import has been fixed for the next build.