I think what happens when you go through an injury crisis is that when you are in the early stages of it players dig in and a bit of a backs to the wall mentality kicks in, you win games that you don't expect to given the players you have missing. Then when you get to a stage when a couple of players come back into the side, expectations are high and you have a bit of a slump. This is all the more frustrating because the fans think that 'if we can beat X-Y-Z with all those players missing we should be winning now with bodies back' this makes it harder to swallow when you lose a few.
Whatever the reason for the slump when players are back (wear and tear on the non injured players/players rushing back to early) it's a pattern you see repeated.
I think we're in our post injury crisis slump, need to get ourselves out of it quickly before we get dragged into the dog fight and pressure starts to build from the teams below and around us.