T-XXXX or F-XXXX

I looked over the FAQ's and couldn't find anything, or I missed it. I have my Alias KCHS1 and under my account it says T-KCHS1
but I also see F-KCHS1, is that my feed or another, is there only 1 KCHS1?? I thought I saw a T-KCHS1 on the list, but it's not there now, if there are two, and someone was before me, should my alias be KCHS2 ??

Im using FR24feed from a RTL1090/VRS install...

Thanks, Paul

Charleston, SC