As I can see on the screenshot, you have several duplicates of the same person. Is it what you were referring to as folders?
If that is the case, I guess something went wrong with import of persons from Picasa. The thing is, Tonfotos can parse picasa.ini files that are stored in your archive and import persons from there. However, something went wrong and import failed. I would suggest you delete tonfotos.ini files from your archive, then remove Tonfotos from Windows (this will clean its database), install it once again and repeat indexing process. After that it should be fine.