Is it common to get odd dreams while listening to binaural beats? I’ve had violent dreams  which I’d never had before.
Dreaming is the brain's way of cleansing and purging emotions from stored memories. It's possible you're going "deeper" with binaural beats and getting rid of some juicy stuff. ;)
However, once people start reporting things like nightmares, I advise them to switch to my "beginner" sleep tracks as they don't go quite as deep.
Dolly McD