You can adjust the sequence ID of a specific member within a collection by moving the ID up or down. When you adjust a sequence ID, the specified ID is exchanged with another ID. For example, if you were to move the ID 2 up, 2 becomes 3, and 3 would become 2.
MOVE_MEMBER_UP to adjust a member sequence ID up by one. Alternately, use
MOVE_MEMBER_DOWN to adjust a member sequence ID down by one.