My Ram is different from yours by a tiny bit, '13 1500 Sport 4x4. I had the same issue pop up the beginning of this week; found nearly the same issues with one exception, the right rear was 5 pounds lower the the others. When I brought it up to the others it took the remainder of the day to finally go out. 2 days later it showed up again, same tire, 2 pounds off from the others. Only thing that I know for sure is the Manual stated that it "may take 20 minutes or more to clear." All that to say, yours may be similar; I feel your frustration too.