First you have to get into BU or others. If you get in, unlikely with your stats, then you can compare offers.
Make sure they take screenshots of the $20k in case it comes in higher and you need to back up.
No one can say why it changed but it’s likely that something your parents entered caused the change. But no one can say for sure.
They might say the same info was entered but they can’t really know.
Congrats on Rowan and good luck.
In the end, you need one at budget. If that works it’s great !!