Adobe Story page numbers all weird...

Instead of a 1, 2, 3, 4 etc. format of numbering there are random sub numbers. Like this, 1, 2, 2A, 2B, 3, 4, 5, 5A.... etc. It seems to be random and I can't get it to go away. Please help me format my script so that this doesn't happen. I have never had this problem before.