Changing the directories installed should fix this
BVE4: C:\Program Files\mackoy\BVE4\Railway\Object\Mermaid Avenue
BVE2: C:\Program Files\BVE\Railway\Object\Mermaid Avenue
Also, the trains on other tracks move, but after a certain point they just respawn back, move up to the same point and respawn back to their original l.. its kinda awkward to me