@Jennifer2550
Yes, it's good to stay positive about it, especially as you think you would only cancel if you had absolutely no choice about it and if you don't care about getting your service fees back, then it doesn't matter.
I'm just saying that the reason the cancellation policy changed was because the length of your stay changed to long-term. Regardless of what the host decides to refund you from the accommodation fees that, and the documentation you mention, makes no difference. By booking a stay that falls under the long-term policy, you have contractually agreed to it and Airbnb has no obligation to refund you just because the host decides to, unless you fall under the Extenuating Circumstances clauses.
It's just a word of warning to other guests in the same situation. If you book a stay, you are tied to the policy that applies to it. Airbnb doesn't change their policies just because a host decides to be nice. It's therefore really important that guests verse themselves in the cancellation policies beforehand. The information is all there but sure, Airbnb could highlight it a bit more.
RE the bug I was referring to, I don't think that necessarily applies to your particular situation as your original booking was not for a long-term stay, so there was no long-term discount vanishing, but yes, overall it's a problem that should be fixed.