Yes, your signal is low. My first guess would be that the dish mount has settled.... if it is mounted to the facia board on your house, my money says the elevation needs to be raised
Easiest way to fine tune your dish alignment is with your TV and the help of a friend/spouse. Grab a 7/16 inch wrench and head out to the dish and without loosening any bolts, pull on the reflector from side to side and top to bottom to see which way the dish needs to move to improve your signal...
Once you figure that out (have your partner reading the signal levels... just check 119 satellite for this to start), loosen the bolts and move the dish to it's new angle and tighten it back down. Don't undo all the bolts at once... each direction only has 2 bolts that need to be loosened.