Burning DVDs, even for movies of less that two hours, ALWAYS requires a DL disc. Dubbing the same movie with my DVD/VCR player only requires a single layer disc - that's without removing the ads as I do when I am using MAGIX Movie Edit Pro MX Plus Download Version.
I have dropped the quality setting but it seems to make no difference. If I have this problem with a 1:45hr movie, what will happen when I try to burn "Dr Zhivago"?