[BUG] Terrain Mode Does Not Respect Ground Level

[Gunslap]

Describe the bug
If you select the Terrain mode and set a non-default ground level, the ground level is not respected (ie: generation will still happen around -62).

My hope was that this would be relative to the selected ground level.

Used bbox area
52.119366,-106.675529,52.159823,-106.637764

Arnis and Minecraft version
Arnis 2.2.0 Minecraft 1.21.4

Screenshots
Selecting JUST ground level = 64:

Arnis world generates at y=64 as expected.

Selecting ground level = 64 plus the Terrain checkbox:

Arnis world generates down relative to y= -62, as if the ground level had not been set to 64.

Additional context
I generated the world over a default world, and was hoping to set the ground level to 64 so that the terrain would be roughly level with the default stuff Minecraft generated outside of the bounds of what Arnis generated.

[Gunslap]

If anyone has the same weird idea that I do, I have found a work around. After generating a world if you open it up in the program MCASelector, you can copy and paste the chunks over themselves and offset the y value to get the ground back up to the level you'd like.