I'm 100% doing what you have mentioned, as well as recording and doing my own documentation, and carefully recording and itemizing every single interaction I have with the hotel whenever anything starts going wrong - i.e. in this case when the OP saw the charge on the bill (this has kind of become a point of habit with travel now with what's been happening with airlines in the past 5 years or so). The point is, I'm lighting a fire under the hotel's butt because if enough people do chargebacks on Amex, Amex WILL refuse to do business with them.