I've reassablemed my car, but now that it's back together, the gaps are all wrong. Is there a certain trick to getting everything to line up? How perfect should I expect it to be?

Also, now that I have the bumper cover on, I can't seem to get it to stop bunching up in the corners. I've circled my problem. Does anybody have any experience with this?

 

Did you try putting a couple of shims where the fender and front bumber bolt together.
You might have to modify the metal strip with the 3 studs. Add an extention to the top stud.