sdrtrun

I have a question that i hope someone can help me with. i'm using two rtl-sdr dongles with sdrtrunk and i am able to lock onto 3 different control channels but i am only hearing these 4 talgroups. VSP Wyt 2 DWR 3 LAW DOC OP W Buch Sheriff 1 but according to my site their are a LOT more...