I bought a package of Fiber One English Muffins in a kosher supermarket. The package had a "KVH" certification on it. It also had a small sticker attached, indicating that it's under the supervision of R. Teitelbaum. What's the deal? I do not mean to discuss specific hechsherim, but does this mean that this Rabbi's agency does not trust the KVH? Would the item need to be manufactured on separate equipment from the ones with just the KVH?