Joined server on iOS, server isn't appearing on PC

Was at the server limit today so I left a server to join a new one. It wouldn't let me accept the invite on PC so I switched over to iOS and it let me join. I checked my PC to see if the account was there but it wasn't. I tried joining on another account on Chrome and it worked, I could talk in the server and everything. When I checked iOS on my main account it said I was in preview mode and had to join the server to talk. And when I clicked that it said "Upgrade to 200 servers"