JesseTraw05

I am 14 and new to 3d printing. I made a design through sketch, for a GoPro camera case. The case had five wholes, Camera, screen, power, record button,and light whole. When I put the STL file in cura it showed all five wholes. But it showed them in all but one view mode, the layer mode. The whole it did not show was the camera whole and that was the biggest. So when i went to print it, it only printed four wholes. Can someone help me find out why it is not printing the fifth whole, even though it is showing all five wholes? -Jesse Traw