I have created a tall cabinet that needs several adjustable shelves, with one fixed shelf in the middle. The fixed shelf uses cams and standard adjustable shelf line boring.

I have created the cabinet with line boring in the correct locations on the side panels.  However, whenever I add the center fixed shelf, I get additional line boring above the fixed shelf.  Some how this boring is attached to the shelf because if I turn the fixed shelf off, the line boring goes away.  I cannot fine where to turn the line boring associated with the fixed shelf off.  If anyone has any ideas, I would appreciated it.  The circled line boring is what comes in with the fixed shelf.