Why do I keep having these annoying dreams?

I wonder if the "dream looping" has anything to do with the DSPS. Sometimes when regular sleep patterns are interrupted it can have an effect on dreams. The link below is to a page that suggests melatonin and other key agents, which operate during sleep, will have an effect on REM and the frequency and vividness of dreams. If you're experiencing irregular sleep, then (in theory) these could be affected.