Not all lines of STL are printing

[galefulton]

I am new to #D printing and I am having an issues I just don't understand. I have a 2D drawing that I have made into an STL. It imports into TinkerCad just fine, and exports an an STL just fine. I can bring that into Cura without an issue, but when I slice it and preview, it shows all of the parts, but not all parts will show as printing when I move up the layers. (and that proves to be correct when I actually print the file)I am attaching the picture, the .stl and the gcode file if anyone wants to take a stab at why this might be happening.