Since the script is generating a fatal exception at "resolve list <path>" it's most likely that the path is invalid and it's complaining about that, or ioFTPD is screwing up in some way but that seems less likely since it's not crashing but throwing a TCL exception. Assuming the path was bad it's also possible that it's been bad for a while and that's causing problems.
If I'm reading you right the big problem is that the dir with the files is somehow being turned into a symlink? If so you can use 'site chattr -l <path>' to remove the link and the contents will then be visible again.