Save hard drive space automatically - Fires Aggressively after 5 minutes of non-use?

Hello, 

I turned on "save hard drive space automatically", however, after just 5 minutes of non-use, it's moving files back to the cloud. Shouldn't this feature leave commonly accessed files on my harddrive? It's very frustrating to wait 5-10 seconds for the file to download to my computer 4-10 times in the same hour while I'm doing video editing, just because the file wasn't used in the last 5 minutes.  Is this feature really supposed to re-download the same file multiple times in the same hour just because it wasn't accessed for a couple minutes? I might have to go back to permanently keeping all files on my hard drive if I can't get this feature to work better. Minimally, I would want accessed files to stay on my hard hard drive for at least a day, but ideally they would stay for a week or even a month. 

Any ideas? Is there some configuration change I can do so that dropbox will keep files on my hard drive longer than 5 minutes? Or is this just a fluke of brand new files? These files are freshly downloaded from a camera, and dropbox keeps deleting them from the hard drive for "cloud only" every 5 minutes, which causes me to re-download the same video clip from the internet 4-8 times in the same hour, which takes 5-10 seconds per clip each time. Help!