Man, I wish I had 68%, not that I have any issue with 50-60%!!
I was curious though. I went to Settings with Hopper 3. All 16 tuners (61.5 and 72)under switch status have check marks. I noticed (under signal strength) tuner 1, satellite 72, transponder 7. And the signal strength fluctuates between 47 and 50. It seems low, but the reception is excellent. I checked few channels. No problem at all. It is a sunny day in Bluegrass (KY) with bright blue sky. I changed the satellite from 72 to 61.5. It again showed signal strength around 50. No problem at all.
I don't know if Dish switches between satellites 61.5 and 72 for better reception occasionally. Our installer, Hipkat hopefully will respond to this thread.