Yes that's a feature of PTCAS, schools can see how many acceptances students receive but they can't see how many rejections and I believe they can't see from which schools specifically.
It's not going to hurt your chances, and if anything it'll actually make them want you more. 🙂
When I went to my Texas State interview, I had already received 4 acceptances. 2 schools gave me extensions to reply (those two schools required a $200 deposit), but the other 2 didn't (I didn't ask, maybe they would have if I had asked... but those 2 schools didn't require a deposit) so I accepted my spot at those 2 schools.
During my interview, Texas State asked me what did I look for in a PT school and I just answered truthfully. I ended up getting accepted there as well, which was my number 1 choice and I declined/resigned at the other 4 schools, so in the end I paid no deposit.
I wouldn't call UCF to tell them about the dilemma because you haven't been accepted there yet. I wouldn't talk about another program to a program you're waiting to hear from, especially since it might not help: if they haven't made a decision yet then there's nothing they can tell you.
On the other end, UF already wants you. So I would call UF and tell them you're waiting to hear from another school in February and politely ask if they usually give out extensions in those circumstances. Because you have already been accepted there, you have nothing to lose because they won't rescind your acceptance just because you asked.