hi there,

if you have a dual LNB (which is that cylindrical device directed towards your dish), then you would require signal from both 91 AND 82. to find out if you have a single or dual LNB, simply look at your dish and see if you notice one or two of those arms sticking out of it.

if, when you select 'BEV 82' in the point dish menu and it gives you a message that reads 'wrong sat' while 91 indicates that it is locked and you're getting good strength then either your cables or your alignment is incorrect. you should verify that both ends of the cable is connected tightly and that you are using an RG-6 coax from the dish to the receiver (the receiver being the actual set top box) with lines coming from both LNBs.

also, if you don't have a switchbox installed somewhere in between the cables from the dish to the receiver, you MUST get one, but i think you do because you mentioned a switch. ensure all the cables are properly connected. as far as adjusting the skew of the dish, i wouldn't know because it depends on your location.

you can do a trial and error test to identify if it's the cable by swapping the cable from your 91 to the 82 LNB and see if you pick up signal on 82. or swap it on the switchbox.

also, how many receivers should you have installed?