I have an old LP which was compiled from very scratchy 78's of Blind Lemon Jefferson (Naturally, as he died around 1930).

All the tracks are recognizable the same person, except one which stands out from the others. To my ears, neither the voice nor the guitar style match the other tracks.

The big problem is that the odd one out is one of his best known songs, See that my grave is kept clean.

Since he refers direclty to himself by name in one of the other songs, they are clearly by him, so is it possible that the compiler mistakenly included someone else's version of the one song?