I honestly prefer dealing with staff for payment, as that's what ex-T and ex-MC had. They did their own scheduling, but if ex-MC had to cancel, he'd sometimes have the staff call and reschedule with us, which was OK. The two most recent p-docs I saw had staff handle both payment and scheduling, which I was also OK with, since I didn't see them nearly as often (once a month to once every 3 months). So I'd try giving that T a chance, he could just be really incompetent at scheduling and things like that.