if they're really listed as "for 2" then two people on the dining plan can order that as their appetizer component on the Deluxe Dining plan. If you're paying cash for the appetizers, they don't care how many people are eating it, lol.
But have to say one thing I noticed was a discrepancy between what allears.net and wdwinfo.com menus are showing and what was actually on the menu at T-Rex and Rainforest...there were several things on the websites version of the menu that said "for 2 or more"...but the actual menu said "for 4". Those were desserts. And both places the waitress told me that you had to have that number of credits/people on the plan to order the "table desserts"...which is what she called them.