Spreading out the food like you are doing is a very good idea. Think of them as a full meal in the morning, then a mini-meal, a full meal in the evening and then another mini-meal.
Would you please put some information in your user control panel for us? The user control panel is in the upper left corner at the top of your screen, below the image of the cat. If you click on user control panel, profile, edit signature, a free form text box pops up. Info to put in there would be your name, cats name, date of diagnosis (DX date), insulin used, food you are feeding, any additional health issues your cat has. After making the changes, click on the submit box below the message and click on yes on the next page if it asks you to verify this change.
Things like that help to give us a quick snapshot of your cat and help us to help you better.
Yes, you have this information in your post but I have to search through several posts to find each piece. It's a little 'buried'. Having all this in one place, and having it appear automatically in your signature would be a great help. I realize it is a lot to ask since you are dealing with this new sugardance, but it will help us to help you better and quicker.