You're probably right. I'll admit that I've never used it before today and just assumed that the inaccuracy was due to the recent hard-fork.

Oh, and since you're here and I happen to know that you're a smart guy, do you have an answer to this question:

Is it Wise to Store Bitcoin on a TREZOR Before and During Bitcoin Hard-Forks?

Please, feel free to answer here or there, it makes no difference which.