Ever wonder why there is three matzot? There is an other explanation besides for the standard one. One is the Cohen the Second is the Levi and the Third is the Yisrael. The second explanation is because in Yachatz we break the Levi matzah to put aside for the Afikoman. If we didn't have three matzot there wouldn't be Lechem Mishnah for Motzi.

haggadah Section: Yachatz