Hazel switching me out of current app into Finder

I've been running Hazel for over a year on my Mac Pro 2008 (10.6.
. I have actions that apply to the Desktop (changing screenshot names etc.), but it's only recently that I've noticed Hazel switching me over to Finder from whatever app I'm on when it runs itself. It never did this before. For example I'll be surfing in Chrome and typing in a field, then suddenly I'm in Finder and I'm adding an alias to the desktop accidentally or whatever. I checked that it was causing this issue by watching Activity Monitor. When Finder became active, I would see Hazel move to the top in CPU %.
Isn't Hazel always supposed to be in the background? Is there a fix for this?
Thanks

Isn't Hazel always supposed to be in the background? Is there a fix for this?
Thanks