Printing in stacks with 3D printer OS?

Hello, I have a question. I am trying to print masks in stacks but without any supports. I can do this with Cura but I have used this service for everything because it is so consistent.

I have printed over 100 in a single format but, When I try to stack them and make the gap double the layer thickness it is almost like it skips the bottom layer for the next mask in the stack.

I have tried different layer heights, and different spacing. Any advice?

I have tried using layer heights of .015, and 0.20. I multiplied the space between then by the layer height. (0.15x2 or 0.20x2).