1.   Adjusting the fence for square is a simple matter, but adjusting the miter gauge slots requires that the entire cast iron table be loosened.

2.   Generally speaking, you check first for correct alignment between the blade and the miter gauge slot.

3.   So must the fence be square to the miter gauge slots.

4.   The arbor and the miter gauge slots are lined up just fine.

5.   The first thing to do here is to see if the blade is square to the miter gauge slot.