OK that makes sense. The Lexington site is about 10 to 12 miles east of Purcell depending on the part of town you're in and in the low spots of town I can see the hand held problems.Purcell was assigned a digital talkgroup for Police Dispatch. Since they are a considerable distance from the nearest repeater, they have been having trouble with hand-held coverage. For a while, they used and RMA channel for dispatch and they found they had better coverage on an analog channel. I believe 61712 is Purcell's analog talkgroup assignment for police.
Likewise, Wadley's Ambulance was assigned a digital talkgroup. I think 61744 is their analog assignment.
Purcell Fire is already analog on Talkgroup 58928.
Of course, this could all be temporary.