The location of a product in a store depends on what the manufacturer has paid for. Eye level location is purchased at a premium. If your item has moved from eye level then that means another manufacturer has purchased that space. Things move. Something has to go on the top shelf. Deal with it.
As for discontinuing, this is common sense. Items get discontinued for many reasons: the manufacturer has stopped making it, which is not the store's fault. Or the item is a slow mover, or the contract for that item/size has expired. Simply put, money.
