Does not uninstall cleanly

Drupal 6.20, Draggable Views 6.x-3.5

When I uninstall this module, some entries seem to remain in my database. Doing a search for 'draggable' in PHPMyAdmin, the system table contains 4 items related to this module.

If you leave those 4 items alone and try to re-install the module, no tables get created for this module and you get big errors when try to use it in Views.

If you delete those 4 items, then the module seems to re-install successfully (the modules' tables get created).

Am I uninstalling the wrong way? Other then unchecking the module in the module listing, what should I do?