Perhaps your signal strengths used to be in the 100's, 110's, maybe even 120's before the SuperDish was installed. The installer could have peaked it to have the highest at 105 because it is harder to tune in resulting in it dropping back on 110 and 119. One could either try to have the dish repeaked or have a seperate dish (a Dish500 with DishPro lnbf's) to receive your 110 and 119 signals if you think that would be easier to peak without interrupting the SuperDish. The wires from the Dish500 could be placed into the DP34 switch. I am guessing that the installer took the Dish500 with him.