Ah. Ds1's dad was very severely PA, finding a website about it was what finally enabled me to feel I was not going insane, and to stop being wistful about him (he left me).
It was such a revelation!
It was all about control. He would make arrangements then constantly be either late or early, never ever on time, just to throw you out - he hated anyone to hang a sign on him, even in the most stupid of ways, like what he liked to drink or whatever - even things like I would ask what his daughter's birthday was, and he would tell me, then later I would mention it and say did she have a nice day, and it was 'Oh, it was on ...day' instead. So I was always wrong.
Very hard to get one's head around. I tried so hard to and he never did end up being straight with me about anything.
The sort of person who never gets involved in an argument, but will wind everyone up until they go berserk at him and claim innocence because he never raised his voice.
And you could never track him down because he was the only one who was allowed to know where he was or what the plan was.