Nancy,
If you are okay with the cost of the strips for the AT meter, then my advice is to just stay with it. To me, it sounds like you might have gotten a "lemon" with the Confirm.
Bottom line? It doesn't matter what meter you use. The only thing that matters is that you have faith in what the meter is telling you. And if the AT gives you that feeling, by all means, stay with it.
A meter is nothing more than a tool. Probably the most important tool available to any of us the successfully manage this condition. But that's all it is, a tool.
The "pet specific" meters are no better or worse than the human ones are. People using human meters use "one set of numbers" and "pet meter" users go by another set of numbers. But anyone, even the world's greatest vet, who says that a human meter can't be used just as effectively for home testing BGs in a cat, is simply wrong. So is anyone who might insist that human meters work best. Every meter, regardless of cost, has the same "allowable variance" of +/- 20%. That's as accurate as they need to be to meet government standards.
No matter which meter one uses, you can take a single (large) drop of blood, use that one drop to do three or four tests with the same meter within a minute or two, and you're going to get 4 different readings. They won't have anything to do with how much blood is sucked up the strip, how stressed the cat is, or anything....other than the fact that no meter is really that accurate. You can have 4 readings off by a wide range from each other, and all the numbers would fall within that 20% variance.
The only numbers that really matter, that should cause you concern are the low numbers, no matter what meter you use. Like "close to hypo" low. On your meter, that line is at 80. Below that, is technically "hypoglycemic". At the other end of the spectrum, whether a cat is at 200, 300, or 600, using Lantus, you're going to give a shot. Accuracy doesn't really mean much on high numbers.
Is your vet okay with "one a day tests"? I believe he is? As the President of the AAFP, that would mean that his clinic is AAHA certified, correct? And I would assume given that, that he uses the AAHA guidelines for feline diabetes management.
http://www.aahanet.org/PublicDocuments/AAHADiabetesGuidelines.pdf
There's 3 pages in those guidelines that discuss home testing once insulin is started (pages 218-220). The minimum requirement is to test between +6 and +8, and the dosage is evaluated based on that data collected over time. They also recommend either more frequent testing, or they advise a curve done at least once every two weeks, if not at home, then at the clinic. Is that your vet's plan?
You'll notice that the AAHA guidelines are a lot less aggressive in some ways than to the suggested methods we use here. Less testing for sure. But they are also more aggressive when it comes to adjustments of dose, suggesting increases of .5 or even 1.0u at a time. In general, it seems as if your vet is using the AAHA guidelines rather than any "protocol" we might follow.