I have just had an essay back and I am honestly confused by the grading. they stated that my essay was good, well-written and interesting to read. The only negative feedback was that they thought my presentation was fair and that I should have double-spaced my essay. This wasn't a requirement and the only aspects assessed in the presentation section of the academic rubric were language and grammar. We aren't required to use a specific format.
I'm honestly just confused. I don't really know how I can improve based on this feedback and I don't understand why I would have been docked for not using double spacing when we aren't told to do this. The whole thing is in Arial size 10 with subheadings. Do I have grounds for an appeal? Is it even worth appealing? how should I proceed?