First, spelling core terms correctly means the reader (not just the judges, but the voters and ultimately the customers) will not get distracted from the awesome by a typo.
Second, this is a job application. It's considered a good idea to avoid typographical errors in your cover letter.
Third, and most important, mojo comes in a lot of different styles. Spelling things correctly is a component of mojo in my book, since it means that the human editors who will eventually publish your work can focus on style instead.
[Of course, note the lack of golem next to my name. I don't work for Paizo now, and don't really expect to, unless I win RPGSS.]