Basecamp Still Sees Deleted Waypoints & Tracks On Nuvi

I have a 3490. I can delete my trip logs and waypoints on the device itself. However, when I connect the unit to Basecamp and select internal storage, all the tracks and waypoints that I deleted on the Nuvi, still appear (but only on Basecamp - not the unit itself). This is a bug for sure as the Nuvi masks out the data but obviously it still is in the unit unless by chance the information is cached on the PC side for Basecamp. Not sure but I have submitted this information to a contact I met at CES so I'm hoping this can be resolved. I would hate to sell this unit down the road with all my information in it (and still building).