Hey Tom,
His mid cycle numbers are great today. Remember, Lantus is a depot insulin so it takes a few cycles for the depot to build when you change doses. However, you may still be seeing some action from the higher dose. I'm not a dosing expert by any means, but if it was my cat, I'd continue to monitor and perhaps hold the dose for a couple cycles to see where he goes. He's getting into green numbers right now, so that's good.
Hoping more folks experienced with dosing will weigh in. You may want to add the "?" to your title and add something like "Dosing question" or "Dosing advice needed" to alert people to the fact that you have a question in your post.
Max is doing incredibly well!! I'm so happy to see this!!