Some could be simply just messing escorts around regardless. Asking for your availability on the specific date and time and one would assume he is interested in booking and book someone else, instead. Just enjoy being mean or play some " I will disappoint you" game. Doesn't bother me though. I just leave a note as TW. I have a handful of previous punters like that.
One made up the second profile after I said, sorry, busy, can't accept your booking. He asked again under his second profile, just to see if I WAS really busy. Good job there are Good guys / Good punters. These men must be miserable in their real life.