I am new to this but have searched around and haven't been able to construct a workaround. I realize what I'm is not exactly supposed to work, but I have seen enough creativity here to not doubt that something can be made to work.
I currently scan everything into my computer with a Fujitsu Scansnap S1500. Everything gets dumped into a folder titled "SCAN TO HERE" with a filename of the exact time the document was scanned (2013_03_03_12_00_00). From there I have been manually organizing everything into separate logical folders ("Utilites", "Receipts", "Insurance", etc.) with more detailed subfolders. As I am beginning to use Hazel I would like to also create a backup just in case I mess up a rule and something gets tucked away and renamed somewhere it shouldn't be. This seemed simple enough to begin with. I created a "Backup" subfolder in "SCAN TO HERE" and wrote a Hazel rule where any .pdf file arriving in "SCAN TO HERE" was copied to the "Backup" folder. Worked great. Then I noticed my other rules weren't working like they were before the "Backup" rule was included. For some reason the backup rule takes precedent over the other rules. If I disable the backup rule the others work again.
All I've been able to come up with is to add the backup rule to each rule I write that sorts files out of the "SCAN TO HERE" folder to a new destination, which would work, but I still wouldn't be backing up the other files arriving that are NOT sorted by Hazel and moved manually. As helpful as Hazel is, there is still some work involved sorting all the bizarre stuff I seem to find to scan!
Thanks for the help!