Duplicate Draw Object Problem

[jeepcatuk]

.

Moderator Note: Please specify what software you are using so this post can be moved to the appropriate thread.
Note also here: http://forum.delorme.com/index.php where the Tips & Tricks forum is not to be used to post questions.

Does anyone know why some draw objects get duplicated over the course of use? I use my map for work and every couple of weeks or so I can go in and find several draw objects duplicated over top of themselves. What's the deal?