[Cura "invents" some layers in my 3d model]

Yes, when I opened it with Cura I saw the notification that wasn't "watertight", but when I inspected my model with X-Ray view I coulnd't understand nothing, it was like everything with different tones of blue and purple. What can I do? Because in blender everything seems fine (not infinite thin walls, not any point or edge lost/repeated...)

 

Thanks for answering

[Cura "invents" some layers in my 3d model]

Hello, 

I've came here asking for help with my 3d model. The problem is that my 3d model (stl file) looks nice until I go to the layer view, then I get noticed that it creates some layers from nowhere. Here there are some screenshots:

 

As you see, Cura creates some layers and I don't know where is the problem. I hope someone could help me to delete them because I have tried to change some edges or points (i thought they could be making trouble to Cura) but nothing of that worked.

 

I designed the model with blender (maybe that is important, idk)