I know you are tired of poking, Rose, and Fluffy is tired of getting poked. The problem here is that we can't be positive about these numbers. They are high and probably will stay that way. But I have seen some strange things after hypo, and unfortunately every cat is not the same in the way they react.
I am cautious and would rather be safe than sorry, especially when giving advice about someone's beloved kitty. You would probably be fine with one unit not testing again. But I wouldn't do it.
Tomorrow if your amps is in the 300-400 range, you can think about 1.3 or 1.4 or 1.5.
Have you put neosporin on his ears? You can use the kind with pain relief. And every time you poke, after you get the blood, hold the spot for a few seconds to help prevent bruising.