Elbutte

We are configured with three single LNB dishes -- one for 110, one for 119 and one for 129. Dishes feed a DPH42 then on into our Wally. Issue is Sat 110. How is it that we can receive signal strength 50 on transponder 6 and only 7 on transponder 5? I have not done an exhaustive evaluation of the other transponders but this condition is adversely affecting us. Sats 119 and 129 are fine. Thank you in advance for any and all assistance. Elbutte