Boy, the oddball chord notations you run into on the intertubes.
In theory, I suppose they could exist. A sharped flat chord would just be same as the original chord. An Eb#m would therefore just be an Em. But that's pretty crazy. I doubt that that's what they meant by that chord. I think it's just a mistake.
What song are these chords supposedly from? And where in the song do they occur?
JJ