I think I can explain that. All agencies have "minimum" standards that must be met for all students but the minimums are set for "easy" conditions, such as in the tropics. If you're diving in more challenging circumstances the instructor has the leeway (and the obligation) to train to local conditions, which may mean adding extra dives.
Of course I can't be 100% sure if that's your case but having the instructor add a couple of extra dives to the course in less than ideal circumstances is something I would ordinarily see as a "positive"
I see. So you didn't "fail" as much as you just didn't finish on teh day you had in mind. I can understand given what you wrote on this thread that your confidence in your instructor is shaken. You do have two options now. The first option is that you can ask (and he is required to give it to you) for a "referal" form. That's a form where he writes down everything you did so far. You can take that form to another instructor from the same agency and continue your training from the point where you left off. Naturally the cost will go up a bit because the new instructor isn't going to work for free but if it's a choice between carrying on with someone you don't trust and paying a bit more to get a 2nd instructor check you out and finish the course under more control then you might be better off spending the money.
The other option, of course, is to go to the owner of the shop where you took your course and request/demand a new instructor because you have lost your trust. That's your perrogative and you're there to learn diving, not make friends. It would require burning a bridge but maybe it's one you feel should be burned.
A third option, I guess, is to talk to the instructor and see if you can patch it up. Given what you've said on this thread, though, I don't think you're ready for that yet.
This is why you can't just give up. There are good and bad instructors at every shop and working for every agency. You know the old joke, eh?
"what do you call the person who finished last in medical school?" .... You'll be able to find somone you click with. Trust your intuition.
R..