World Machine - Tiled landscape inverted?

Hello, I’m having trouble getting tiled landscapes into engine.
I’ve managed to import a single 4033 map, but not a tiled one.
Here’s the problem I get with the options I use.
My assumption is that I should untick flip Y, although the UE documentation says I shouldn’t.
Also my WM resolution is 4033, how does this differ from my tiled resolution?