Inan mfg model, I created holes in step 5. However, in the drawing, only two of the three patterns in the step appear, and they only appear as hidden lines (they should be visible on the surface). All of the holes appear when I change the view display to hidden and back to no hidden, but they revert back when the sheet is updated. The holes are visible in subsequent steps (step 5 is the only problem). Also, in side views, the bottoms of the holes(but not the sides) are showing up in all steps, even though view display is set to "no hidden". Any ideas how to get the holes to show, and the bottom of the holes go away?