Image files replicating outside of the Images folder

I am using RoboHelp 10 and having an issue with image files relocating themselves. Basically, every time I close the project and then reopen it, a good percentage of the image files have replicated in the main project folder. The change in file path causes the images to disappear from the topics, even though the same image files still exist in the Images folder. This does not make sense to me.  I created a test project and deleted all of duplicate image files from the main folder. Most of the images remained intact within the project, but not all of them. Can anyone tell me what is causing this or more importantly how to solve the problem?

Thanks!