Dropbox is creating two of the same file when I drag and drop a folder into it. For example: If I have a folder named "Updates" on my computer with one Adobe Illustrator and I drag that folder into Dropbox, it will upload the original folder, but the ONE file inside of that folder will now have two illustrator documents. One will be the original file such as "Test Illustrator.ai" and the other will be "._Test Illustrator.ai"
This only happens when dragging and dropping a folder containg files. If I create the folder in dropbox and just drop the Illustrator document I will only have the one original copy.