t90

Hi, I have a T90 fitted with 2x LNBs (19.2 & 28.2) - works fine (well sort of...). 19.2 signal strenth is fine (70-80%) on all transponders. 28.2 on SOME providers such as "Quest", "Santana" are giving me a signal strenth of 80% - BUT some providers such as S*Y etc are showing 25% making them...