Quote:

...Most of the rest of the trunk (floor and over the wheel well bumps) is kind of a brownish burnt gold color...



A picture would help.
That particular color that you described could be explained.

The factory has accidently painted the unibody an incorrect color. Later in time, the factory may have corrected the paint???
There are several know examples.
Another option: is the trunk color more of a factory red primer?