Will I get a negative LOR from my professor I have recently asked my professor to write a LOR for my taught master program application. We are not so familiar with each other, but at least I have attended one course of him (got A grade) while my final year project literature review was also supervised by him (luckily A grade also). Originally it went quite well, the prof said yes to be my referee. But then it turned out like the application system is super weird, the LOR submission can be done by the applicant itself (simply uploading the signed LOR) or the referee can email the LOR directly to the uni. When I told my prof, he replied me like

'I have never given students LOR and I don't believe in any application handed in by applicants, so I will email the letter directly to the uni'

I am now so scared of getting him angry. Will I give him a bad image,turning out write me a negative LOR. Shld I find another referee in case somethings goes wrong at last?
I don't think that there should be any issue. Your professor is right - most LORs are submitted directly by the referee to the university (to avoid the risk of falsified references). I would thank the professor again, say something like "yes, I thought that it's kinda weird that the system asked me to submit the reference. It makes much more sense that you do it" (putting you and the professor on the same page, while placing the blame on the system rather than on yourself). 

Generally speaking, it would be good to have a few referees to rely on, but I don't think that this incident "burned" one of your referees.

Good luck!