Set up 4 receivers with a DP44, did a switch test and all come up with a DP64 installed? 301 receivers, Dish Pro, RG6 cable, all connections with compression fittings. Cable problem, receiver problem? Lost in Baja.......
Are you certain it didn't read SW64. I believe that in certain install that is the switch that is displayed for some older DP boxes, but it is supposed to be OK.
Are you using a DishPro LNB? I know you guys are using larger and different dishes down there so you might not be using DishPro LNBs. If you put a legacy LNB on, I imagine you wouldn't be seeing any signals up at the 1650-2150mhz range so your receivers would be defaulting to the legacy test since the initial Test 1 of 1 looks for signals above 1650mhz. Try disconnecting the LNB cables from the DPP44 switch and run the test. It should recognize the switch. Also, do you have a power inserter installed for the DPP44 switch?