Comment 8 for bug 765084

Sorry I didn't reply earlier, I never used unity before. I finally tested it with Virtualbox.

How did you maximized the window ?
fullscreen is a different from maximized, in fullscreen mode there is no window decoration at all, by default you can toggle the fullscreen mode with F11, but it seems there are some bugs with it and unity :
 - there is to be a bug with unity which makes it impossible to de-activate this mode if the window was created in this mode. And as gmb saves this mode on exit, that may be why you don't see it with another layout.
 - there is also a bug when using 2 monitors in unity and fullscreen windows, the top panel is not hidden as it should. (I found this when testing the emulation of 2 monitors in Virtualbox) This would correspond to your "slightly off correct positioning".

I couldn't reproduce the part about not being active in the launcher.