Yeah. Manually advancing the shutter lets you keep doing double exposure. But that is tough to do accidentally.
I made the video before I got rolls back were the first frame were fogged, so the loading adjustment isn't in it. Not sure how my lab loads the film, but sometimes the exposed end is at the end of the roll, other times it is at the beginning. I just give it about an additional half turn after the arrow lines up and have been fine.