Yes, it's normal in P5 to have to deselect then reselect the part being injected for the dials to appear. "...an injection pose appeared in the 'head' morph list but when I added others, they never did display" This isn't normal, though. You deselected the reselected the head? Could it be you just didn't see it? Maybe it got put somewhere in the middle of the dials or something.