That mux is coming in very strong here in Maine too. All 5 channels, although the actual names aren't listed.
Assuming that the other channels on the mux are working, is it possible that there is another channel already saved with the same parameters, and the receiver just decided not to save this one as a new channel??
Sometimes when I scan in a transponder, I have a hard time finding what channel number the receiver saves them at, if they were previously saved, and since those channels just have generic 1,2,3,4,5 names, it's possible that another channel with the same parameters has already been saved?