I personally think cancelling is cancelling and taking it literally when client cancels is good professional practice. If Ts had to guess what someone's true motives are through emails, that would probably be very inefficient in many ways. I have students who cancel meetings and other things in schedule in similar ways and what I've learned is to take it literally - they are responsible for that part and handling opportunities. I understand the arguments behind seeing it negatively, but for many people if that behavior was always considered and taken lightly, it would hinder progress. Just my opinion.