get better box like cw600p or viewsat you will not have this problem you can get cw600p for 110CAN and the viewsat is more money but in my eyes this is the best 2 boxes on the market
The Duncster...pretty much all pansats suck bigtime..and 2500 series prob being the worst of the line....No matter what bin you put in...you will see some fatigue in channel switching.
I highly recommend you moving on to a better/more stable receiver. You can check out viewsat/extremeview magnum/captivework
Those are pretty much great receivers at the moment and wont let you down. Stay away from pansat...they are goin down the toiler really really soon.
And i myself am coming from a clone of pansat so beleive me...anything is better than that receiver.