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?