ZBrushCentral

Insert Brush Issue

I’m trying to make a stitch brush using an insert brush on a curve but when I apply the curve I get this weirdness.

On the front, only parts of the first and last stitch are visible. The three on the right are placed one at a time and what I want it to look like.
Screenshot 2023-12-17 160209

On the back, they’re flattened and pushed under the surface.
Screenshot 2023-12-17 160204

If I make the brush larger, it appears that the mesh is sectioned and hollow.
Screenshot 2023-12-17 160655

I’ve tried adjusting the depth and stroke count, but those don’t fix it. Can anyone help me resolve this?

Thanks.