I know! i hate to see you skip. . The only thing I can figure out is that he takes awhile to react to a dose. It is lovely to see him move. If he gets up in the 150 range, do you want to try something like .5 and monitor? He is almost certainly going to bounce but for the next full shot, how about staying in the 1 unit range?
It is hard to know how to react, but I hate to see you lose momentum. Go with your gut - whatever feels safe to you.