Have you gotten feedback in the Lantus support forum from any of the dosers there? If fat 0 is dropping you into the 30s, it sounds to me like you shouldn't be giving insulin, but your spreadsheet is full of enough high numbers that I certainly don't know enough to give dosing advise. If you see a really low number, can you try lc or mc, maybe Jane is like--I think its Jill's Alex-- that is ultra-sensitive to carbs and a lc brings up those low numbers just fine.
It also looks like you have a lot of variances going on moving the shot from flank to scruff, feeding HC and karo and now you've started the methimazole. Lantus loves consistancy. If you continue to dose, I would pick flank or scruff and stay there so that the absorbtion on each shot is consistant. It looks like the numbers really started going low after the start of the methimazole? Maybe that is clearing up what elevated the BGs and you can give stop dosing and see how things progess? I think that is something you'd want to get the dosing experts advice on over in the Lantus support forum though.
My girl was was not typical IMO, just didn't waiver all that much no matter where we were in the dosing scale or the trial. But, we did rise a little at first and then dropped and settled in nicely.