Drop down cell not showing all options/Significant loss in functionality

Hello. The first problem with my issue is that I don't know the proper terminology to use to describe what is going wrong. I am a sports nutritionist and started only working online in Jan 2012. I use a spreadsheet created by an unknown source. The purpose of the spreadsheet is to have a "library database" of food choices including each food's macronutrient content and total calories and after launching a menu creator I can create custom menus from the foods in the library. I figured out how to add foods to the template and how to launch the menu creator, but recently as my library has grown, after I launch a menu the drop down box in column A doesn't show all of the food options entered in the template column P. When I save the document is warns me that there is a problem "significant loss in functionality", but I don't know how to fix it.

I have attached my master copy of the document with 1 menu launched labeled "high". Any help would be GREATLY appreciated!!