Change the final case of the enter stack button so that LEVER_4 -> GROUND (instead of LEVER_4 -> LEVER_4). This makes it so you can cycle 1-2-3-4-Ground-1-2-3-4-Ground. Otherwise, the only way to get from 4 to Ground is to press A twice, sending it from Stack 4 to Inside and then back to Ground.
Change the final case of the enter stack button so that LEVER_4 -> GROUND (instead of LEVER_4 -> LEVER_4). This makes it so you can cycle 1-2-3-4-Ground-1-2-3-4-Ground. Otherwise, the only way to get from 4 to Ground is to press A twice, sending it from Stack 4 to Inside and then back to Ground.