I don't think there is anything wrong with the leg. Looks like a lighting effect causing the bulge at the elbows to make it look disjointed. The creature has a bit of sausage link arm going, i.e. pinched at the joints (I don't mean this as a bad thing, just an observation).

Overall I like it, just not too sure about the barrel on it's back, but I'm sure you'll put it to good use.