Good job on your first build!
As for the backplate - you should be able to align them perfectly. Are there any wires getting in the way?
Also could you take a picture and post it here? A pic of the back plate, and a pic of the motherboard. It could help us help you solve your issue.
No, there are no wires getting in the way, it just pushes back on the motherboard a lot. I am having problems focusing the camera on the back plate.... I will try to get a picture on soon...