Amscot Cash Advance Denied After Given Routing Number

So I went to go do a cash advance to have some extra funds for shopping. I make enough money now where paying them back on my next check wouldn’t hurt much. Plus I get paid again in a few days. I just didn’t wanna wait! So I go to amscot and while they’re doing the paper work and I send my documents she comes back and asks for my routing number. I gave this to her and then was told that I have an advance out already that I need to pay. I recall one from years ago that I used to help my girlfriend at the time pay rent. I was given paper work and told that they can tell me where to make the payment below. My concern is this though. Why did she take my routing number? Are they trying to do something to
My account?