@Moi: Ash and I went to visit some friends on Saturday and I was given too many tasty but strong drinks and then I was hungover for 2 days

I think I don't digest well in general and alcohol sits for too long in my system. I mean, I wasn't like DEAD hungover, I still functioned like a normal human being. The first day I was a bit tired and nauseous, then yesterday I was hella tired. And that's it.
No, not all people notice these things, I think it might be a sensitivity thing. Highly Sensitive People notice mostly anything, they always gather and analyze information even if they don't do it consciously. Then there are normally sensitive people who might notice things or might not, then non-sensitive people who are completely clueless and rude and don't even realize it...
@jacob: Did you get some written summaries of the "very important although in fact quite useless" video calls? If not, maybe you could ask them to make such after every video call, just to not miss anything. If he doesn't care about being charged extra then I'm not sure anything would help. Sounds like a hopeless cause
Did I understand well that there is some mixup with your rates? I thought you mentioned that earlier but maybe I misunderstood something.