Her basal needs may be increasing, she may be coming out of a honeymoon. Popcorn isn't high carb, if you make it yourself with an air popper and add butter it's only about 4-6g per cup I think. Crackers and tacos could be spiking her too, some people don't do well with grains. I've eliminated most grains now although I occasionally have some toast or a very low carb fiber cracker with cheese. I eat berries and don't have a problem with them either, they're relatively low carb, but I would eat small portions only probably.. it really depends on the person.
And yes with type1 there are many times I spike for no reason and go hypo, this is typical of many type 1 if you tend to fluctuate a lot.
My endo does the fructosamine test also and the glycomark which shows how high you spiked in the past 2 weeks or so. Even though I have a low a1c I spike high at meals it seems according to that test anyway, not sure how accurate these tests really are, I tend to spike a lot it seems no matter what so I try to limit the amount of carbs per meal. It could also be showing my spikes when my basal shots run out too.
My A1C is not high though. 11.2 is way too high imo so I think she needs to bring it down more, at least 4-5 points, slowly because doing it too quickly can cause retinopahty in some people, with either a higher basal dose and more bolus for meals if she is spiking a lot after meals and pre bolus if she doesn't do that. A lot of people say if they exercise more it keeps them lower too. I tend to go hypo a lot so although I'm quite active I go easy on the exercise. Today I was in sick with a bad cold and I've been going low a lot with almost no activity so I never know what will happen.
My endo recommends an A1C of 6 to avoid complications.
Her current A1C if it is accurate means her average bg is in the 270's which is very high. I was already in dka at that level. Mine was 13% at diagnosis.
If she gets her A1c lowered there is a good chance her neuropathy symptoms will get much better or reverse as can any other damage that has been done.