problem with uv map import/export

[empoweredindie]

I hope this is the right place to ask this question. I imported a mesh (.blend file) into ArmorPaint and my goal is to retexture this top I made.

Here's what the uv map looks like in Blender:

But when I try to import this .blend file into Armorpaint, it includes not only the top uv map but a uv map of the entire body (parts I've deleted in an effort to only export the top). Can someone let me know what I'm doing wrong? I am essentially trying to replace Substance Painter to texture Sims 4 garments and export them as jpg for the Sims 4 by using ArmorPaint.

Imported UV Map in ArmorPaint:

And after recoloring and exporting into S4Studio, this is what it looks like:

My goal is for it to look like this where the only thing recolored is the top: