Leak over top of window

Just noticed today that one of the lower corner of the bottom panel of the garage door is bended along the side. I had previously removed some rotted materials along the center bottom of this panel where it touches the ground and replaced with wood. The bended section was not touched. It's bended probably due to rot. Now this corner looks like a V. Any suggestion on what I need to do about it? Should I just replace the whole door or can I do spot repair or replace the damaged panel? Will this cause damage to other part of the door (e.g. the hardware,...etc) if I leave it the way is? Thanks!

I have a new sliding screen door to install. It came with two plastic pieces with ridge down center of each, 2 screws and a flat metal piece about 1 1/2" long. It also came with absolutely no instructions on what to do with these gizmos or how to hang the door. Help! :confused: