We've also had some windy rainy weather that have messed with the birds lately here in the U.P.. Over the course of a couple weeks I have seen 36 birds that roosted all together two weeks ago, split into groups of three and roost elsewhere only to regroup into 30 some in the same tree the week later. I think they are asserting their respective domininance and regrouping in the bad nasty weather, but I'm not sure. I wouldn't worry about new girlfriends, just find out where they are roosting the day before or so and setup as close as possible to their fly down spot and morning travel route. Good luck.
"After eating an entire moose, a mountain lion felt so good he started roaring. He kept it up until a hunter came along and shot him. The moral: When you're full of bull, keep your mouth shut."