Lisa,
Your beautiful Prince needs more insulin! Unless you are missing some lower numbers, he hasn't seen normal numbers in months. His body is used to these high numbers, and it may take more increases before things look better.
Back in April, he was starting to see blues at 2.75 units . . . then the reset back to 1 unit by the vet in mid-May. In hindsight, it looks like that was a bad idea.
Obviously I don't know all the history, just that your gorgeous boy needs more insulin now.