[LE] Importing new heightmap

[g0blinvomit]

I created a heightmap with photoshop and created an .esp using TESAnnwyn, ala this old tutorial. It took a full day and a half of finagling to finally get the heightmap into the creation kit in a way which is semi-functional. The landmass in now the right size and the right shape (horribly terraced, but easily smoothed out). However, no setting I use in TESAnnwyn is placing the landmasses center at the 0, 0 cell and for some reason it is making two landmasses. The result is always two identical landmasses next to each other and way off center. I've included a screenshot of the world space in CK's heightmap editor to illustrate what I'm talking about. It's really weird. You can see only the two pieces at the very bottom of the heightmap editor view which correspond to sections of the landmass at the most north. The entirety of the landmass is however present if I explore the world space in the render window. It seems the top right corner and top left corner of my heightmap are at the center of the heightmap editor view. I can not imagine why lol :cool:

 

At this point, I'm kind of tired of messing with it and would sort of just prefer to now flatten out or ignore the second landmass (it's far enough off that I don't think you'd be able to see it) and not worry about the primary landmass being off center, but I'm worried about how this will affect the mod. Like, does this make the world space much larger than it needs to be and will it affect performance?

 

Would appreciate any help or advice on this or if anyone knows alternative methods of importing heightmaps. I'm not impressed with the quality of the import by TESAnnwyn, compared to how my heightmap appears in photoshop and in TerreSculptor.