HiCustomerThank you for choosing JA, I will do my very best to assist you with your concern.
To address the front brake issue. Normally what happens is the front brake pads get hung up in the caliper frames,this causes the front brakes to drag. Take the pads out and clean up the brackets so the pads can move again and this should resolve any drag you may have.
As for the screws in the front rotors. These are only there to hold the rotors on during the cars ride down the assembly line and don't matter once the brake calipers and brackets are installed. Hope this helps!
OK, I am going to try and send just the images in the order they appear. They really aren't that great and I think the one image I did get to you will probably help more then these: