If you will have better results or signal with dish 80 cm , do it the same thing with new dish , but we will see tomorow.
I know that you will solved your "problem" with new dish.
I think so too, this 100 dish just bought I don't know why but it has always given problems, mounted on the pole aimed at 13E the maximum signal I could find was 60% maximum 70% with an 80cm dish always mounted on the same pole, same lnb , same cable, the signal is 91%.
With a larger dish, shouldn't it increase and give a better signal?