How do I delete rogue versions in Google Scholar?

For some reason I don't understand, Google Scholar thinks two of my papers are the same, despite different titles, co-authors, and publication years. When I click on one ("Resonant absorption as mode conversion?") it lists 27 versions, most of which are the completely different paper ("Three Dimensional MHD Wave Propagation and Conversion to Alfvén Waves near the Solar Surface. I"). It therefore combines the citations for the two. How can I split them? I even tried deleting both papers and adding them manually from scratch, but without success.