I think I might have an answer, from http://search.cpan.org/~simon/Image-Seek-0.01/lib/Image/Seek.pm:

cleardb

"Clears the internal database. Note that loaddb will load into memory a bunch of data that you may already have - it will duplicate rather than replace this data, so results will be skewed if you load a database multiple times without clearing it in between."

Update

The results are somewhat promising, but I'm going to start from scratch and rebuild the database.

Update

Putting the cleandb command in the file before the loaddb command and telling the module to export the function sort of works but it causes the database keys to count down instead of iterate up. I also tried putting it after loaddb, but that seems to result in a hung makedb.pl file and no redirection.

Anybody have any ideas on how to use cleandb correctly?