First off, thanks for a cool program. I use it quite heavily.
When I mark multiple computers, right-click and select add to custom group, only every other computer gets added to the group; comp1, comp3, comp5,... get added but comp2, comp4, comp6 do not.
Also, AA does not automatically save custom groups, I have to save to file first. Would be nice to have it automatically keep track of the groups.