Hi August,
ok, great you figured it out !
A few little tricks to beat them into shape, most of them should still work in N6.x, up to C6.5 they made for smooth sailing, the flaws in C7.x are specific to that miscreation of a mixer, not the WS per se.
Try them, even if they don't make obvious sense at first glance, this is the Twilight Zone after all.

- always save them locked
- stretch the main window across your screens,
do not maximise it !
- mixer not full screen, not AOT !
- plugins should be AOT however !
- leave at least one pixel of space around each child window, everywhere !
- you can use macros to recall the WS, to work around certain bugs and limitations
- consider assigning single key KCs or dedicated controller buttons, the easier you can recall them, the more useful they become
- apparently the erratic mixer zoom (aka Kermit) cannot be fixed without a complete rewrite, as admitted by Steinberg here :
nuendo-6-5-end-may.html
The same is probably true for the other mixer showstoppers ...
cheers, ymmv,
Rhino