Nix, does it work to click on "Edit this Food"? Can you change the quantity there? If not, it may be worth it to one time just create it as a new custom food the way you want it to be, then you won't have to change every time.
"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