First, I want to remind you that only one story is to be submitted to the queue at a time. Check your account to see if chapter one is still there.
We do go by date. However, there's always the odd one that's being mulled on and checked out by more than one mod. I would say, PM the mod that took care of your second chapter (or email), and tell them about your chapter one.
Please do not submit more than one chapter to our queue at a time, in any category.