What I've noticed is that if you use a capital letter, it alphabetizes the custom foods. If you start the food with a lowercase letter, it puts it in the order it was added, not alphabetically. And the lowercase ones are always after the capitalized ones.
"If you drop an egg, you don't say, 'Oh, shoot' and drop the other 11, do you?"
-Source unknown, but obviously brilliant
Reached goal 4/16/2010...but kind of afraid to look these days