utorrent works, bitcomet doesn't?

So I had to reset my modem and router. And tried logging in. No matter what port I used it wouldn’t listen. So I thought it was something I did. I downloaded utorrent, it connected to port 26670 and worked. I shut it completely down. Waited, tried bitcomet. And it said it was unable to listen to the exact same port. so now I’m confused as to why this is?