Maybe they were updating their site and those just happened not to show up. Or maybe they're coming out with new ones that have more absorbabcy or a better fit, and need to clear the old ones out of the warehouse. Its not the end of the world!
They got rid of them because they just changed the Easy-Ups to be more Like Pull-Ups. It used to be that Easy-Ups were designed more like a diaper, and meant for standing changes, but now they are the new training pants, so they don't need the feel and learns anymore. Big Lots, 5 Bucks!