Platform is Win7 x64
First is the bug(as in unexpected/illogical behaviour). Its related to the "decombine on mouse hover" function. Explanation is gonna be a bit invoved.
Lets say have 2 groups that are just one shy of combining.
1. Mousein on GROUP1 and mouseOut. This will combine G1.
2. Mousein and mouseOut on G2. This will decombine G1.
If you repeat 2, it will combine G2.
That behaviour, is both annoying and not part of the feature(making it a bug).
One other thing also if possible - suspend changes to the taskbar(i.e. combining, decombining based on active/hover) when right-clicking, until the menu closes. Its confusing - if it changes on menuOpen and the windows shift, you can't be sure on which one exactly you clicked.
I could probably be coerced to make a video if you think it will help.
Customer support service by UserEcho