I think this is pretty common. Kids are still figuring it out senior year. My D applied to a lot of small, a couple medium, and a few large colleges b/c she didn’t know what she wanted in terms of size. One of the large colleges made the list b/c of a particular program they had that she was interested in.
It was during accepted students visits that she realized she wanted small, though one of the large made her ‘final four.’