We are under a foot of snow around here today, so I can't take a drive to confirm this, but it appears that these are two different cemeteries.
Zion Memorial UCC and its cemetery are located on S. Dixie Dr., definitely in Moraine.
But the former Salem Evangelical Church in Ellerton is located on S. Union Road, formerly in Germantown and annexed by Miamisburg in 1991. This cemetery is on the national register of historic places in the county.
If there's anything else I can lookup for you, let me know and I will try to do so.