[elgemcdlf]

That is most likely why you are missing the sat. You did not need to "tweak" USALS. Your dish was out of alignment. You most likely were either hitting a fringe of the signal or a sidelobe which you can no longer hit. If you take the system back to 0 and then peak your true south sat. Then using preset USALS start walking to each sat from the center out. See how many you get. Adjust your dish and motor elevation accordingly until your system tracks the belt properly.