My cat grazes too, and as Janet and Kris said, as long as he eats a few bites so I know he's feeling okay and willing to eat, that's enough. I give the shot and leave the food out.
If are trying to give less treats, I would suggest buying a replacement treat that is low carb and lock away the junk food in your hypo kit - only use in case of emergencies. Here are a bunch of good options:
Bonito flakes – these are sold in some grocery stores as a human food. They are tissue-paper thin bits of fish and are easy to sprinkle on food to get a kitty to eat, or put on a little plate and they will gobble them up. My kitties will take my fingers off if I don't let go fast enough. They last forever and are the cheapest option.
https://www.amazon.com/Kaneso-Tokuyou-Hanakatsuo-Bonito-Flakes/dp/B0052BGLMS/ref=sr_1_3_a_it?ie=UTF8&qid=1516455184&sr=8-3&keywords=bonito flakes
The next two are more expensive, but they are good quality and they are more what you would consider a typical treat – something your kitty can actually bite into:
https://www.amazon.com/CATMANDOO-Freeze-Dried-Wild-Salmon/dp/B005FFHLUM/ref=sr_1_cc_1?s=aps&ie=UTF8&qid=1516455237&sr=1-1-catcorr&keywords=freeze dried salmon cat treat
https://www.amazon.com/CATMANDOO-Dried-Chicken-Pet-Treat/dp/B00II6TGV2/ref=sr_1_6?s=pet-supplies&ie=UTF8&qid=1516455268&sr=1-6&keywords=freeze dried chicken cat treat
The next one is probably my personal favorites as they look like what they are. Sometime a little too much so though in the case of the chicken hearts. It is an actual dried heart. I usually have to cut them into a couple of pieces since they are a little bit big and hard for the cats to bite into on their own. They also have little minnows that are the whole fish. And a variety of other options. Often the dog treats are a bit cheaper, and since it’s a whole, dried protein, it doesn’t make any difference if you buy the cat or the dog versions.
https://www.amazon.com/Essentials-Freeze-Dried-Natural-Chicken/dp/B06XN61PYR/ref=sr_1_4?s=pet-supplies&ie=UTF8&qid=1516457805&sr=1-4&keywords=vital essential cat treats
As far as food, it's fine to leave out wet food for grazing. Cat food with a lot of carbs (anything over 10%) is the reason why cats gain weight. A cat on a low carb diet will generally reach a healthy weight (assuming there are no other health/mobility issues) without a lot of fuss or forced starvation. Carbs are also why you're seeing such high numbers for Jaxa, so as soon as you can get rid of that kibble she'll likely start losing weight and feeling better. Believe me I know how hard it is! My kitty was a committed kibble addict when he was diagnosed and it was
hard to get him off of it. Now he's svelt and energetic and so much better off, but it has been a long road to get him here.
Finally, it looks like you're moving the dose around a fair amount. I would recommend picking a dose and sticking with it for a few days, then doing slow, systematic increases of 0.25u at a time every few days. We would be very happy to help you get that figured out if you'd like some guidance there. I know you were just asking about eating though, so don't want to get too far off topic.