Hi Aim. I moved your thread to the AT&T All Things Root forum
I'm not very familiar with rooting the AT&T S4. I'm fairly sure it has a locked bootloader and that is probably why you are seeing unlocked. The bootloader has to be unlocked to root it.
The best thing to do at this point I think is to load the stock firmware back on it. Check this thread
and look at #3 where it says "How to Prepare Your Phone to Return to the Store or for Warranty Replacement. Or how to set your Back To Stock."