Your best bet is to tune in the dish with the 129 sat, not the 119 or 110 because as long as your mast is plumb and your dish is to specks then tuning in the 129 will tune in the weakest signal of the bunch and you can expect to have %75 - %85 on the 129 with the 110 and 119 with ranges of %90 - %105 respectfully.
You said that the 622 is not installed, you have also said that 129 is unwatchable, and you said that the signal goes from %65 to 0.
(1) if you dont have your 622 then how are you watching anying on the 129 sat?
(2) see (1)
(3) is this on single transponder that your watching or is this a general listing of all transponders such as transponder 1 has %0, transponder 2 has %60, 3 %68, ect ect ect, the details are in the pudding.