[White indicators showing in print preview]

Which model? The CAD model or the STL?

[White indicators showing in print preview]

Question I have regarding print preview...What are the white indicators that are showing up on this print preview, will it affect my print,  and is there a way to get rid off them?

I thought they might be seams but seems strange to have they in random places.

 

 

 

[Selective Botton Layers?]

Below is what I want to print.

 

Below is what Cura is slicing. I don't want a bottom FIRST layer. I do want subsequent bottom layers printed but Cura won't do it.

 

Works great except I don't want the initial first yellow layer (red X). Other top/bottom layers I want (green Check).

Also below bottom view shows where I don't want yellow layer and where I do want it (green).