Yes. It turns out the Samsung Health app also tracks your steps via your phone, and it merges that step count with that of your Fit. It also claims that the merging process assures no steps are duplicated, so if you're walking around with your phone in your pocket while wearing your watch, you won't have to worry about the number being doubled. This is convenient when you're, say, pushing a cart around a store. Your watch won't track much of that movement because your arms aren't moving, but your phone will.
It follows that the result on your phone will have a more complete count than your watch (and, as a result, will be a little higher).
One thing I learned: the app does NOT sync the total step count back to your watch. Whatever number is shown on your watch is the step count it has tracked, and whatever number is shown on your phone is the total count merged between the app and the watch.
Hope that helps!
