Clicked Apply a few times on accident

While importing two new plains to my collection, I accidentally hit the Apply button a couple of times. Now the number of plains I have has greatly increased, and I'm not quite sure why. Some of the numbers have increased as much as five times.

Is there a simple way to reverse this, or will I need to go back and manually recount them all? Don't think I've made a recent backup that I can easily chekc either.