Referring to a previous post that was not resolved "Admin Menu Problem after installing extension" I also installed CB2.0 over 1.9.1, running in Joomla 3.3.6.
No issues on upgrade, successful install. (Love the new control panel) BUT, I now have two menus for CB, one under components and one attached to Joomla Main Admin menu. Both work normally.
Any ideas?
If it appears to be too good to be true - then it probably isn't..