First let me express what a great resource Musicbrainz is. I am happy to contribute, but sometimes we run into a bit of trouble. Here is an issue I ran into lately:
Sometimes a release is marketed as a compilation, but is in fact the work of a single artist. In particular, I have two releases of this type (that I know of):
My guess is that the releases best be kept listed as compilations, but somehow linked to the responsible artist. But I am not really sure how to handle that. Here is hoping that somebody on the forum can give me a few pointers. Thanks.