Hi Andrea ~ first I want to say that since Sweet Pea was just DX in July, she has a wonderful chance of getting into remission. Bubba was just deemed officially OTJ( Off the Juice or insulin) yesterday and he was DX in May of 2015! So, PLEASE don't let your vet discourage you.
With Lanus, consistency with dosing is very important. You want to shoot the same dose 12 hours apart otherwise it confuses the depot. Since you are an AT 2 user the reduction is 68 for following TR and 90 for Start Low Go Slow method. Your signature doesn't indicate which protocol or method you are following. But right now it looks like she could use some more insulin. And that said, I saw in your previous post that you are working to get her off the Purina DM dry which will really help bring those numbers down. So, if you could get keep reducing that dry till she is completely getting only wet low carb food you could see those numbers come down.
If she were my kitty I would take her back to 1 unit and keep up the good work with all the testing and keep working on getting rid of the dry food and I think you will start to see those numbers coming down. One unit will be a good starting place again to consistently dose her and we can move forward from there.
You can post daily on the Lantus forum and that link is right
HERE and the peeps there can help you with dosing. I see you are in NY and I am in EST time also. What is your shot times , and I will look for you?