The Internet Movie Database
has no entry for All the Other Zombies
, and I can personally say that I haven't hear of a movie with that plot. Of course, while I have an extensive knowledge of Science Fiction movies, I am not perfect and might have missed something. Your best bet is going to the IMDb and using one of their search engines.
By the by, the plot you describe does sound familiar, but I keep thinking it's from a story rather than a movie. Not that it can't be both, mind...