I didn't notice until I was ready to export that my video is not in 1920x1080. The project assets are.
So, I went into project settings to change it, but it won't allow me to. It's set for DSLR (640H x 480V), and again, these boxes are grayed out, so I can't change them.
You can't change that once you start a project:
After you create a project, you can only make minor display-related changes to the project settings.
You cannot change the Editing mode and the format of Preview files after you create a project.
Although a lot depends on which version of the program you're using.
Some versions of the program will automatically update the project settings to match the specs of the first video clip you place on the timeline.
Which version of the program are you using?
What model of camcorder is your video footage coming from and what format is the video?