Selecting Seats

I’ve “selected my seat” a bunch of different times for my flight Monday, but it keeps getting reset. I set them all when I first booked the tickets a few weeks ago. I selected again about a week ago. And I go now to double check the exact time of my flight and all, and two out of my four legs are reset again. Grrr…. here I go again. Less good seats to choose from now of course. And I bet when I actually get to the airport, I’ll have to select my seats yet again. Grrr…