I don't know of a way to turn off the always on top mode for console window view when undocked, I don't think it can be done currently.
 
Since I always have the console mixer undocked I would really appreciate the "not always on top" option. If there is already an easy way to do this please enlighten me. Thanks for listening!

If you float the entire multidock off on to your other screen then you can switch between tabs.