I am having a problem routing the edges of a board, when I set up the machine I select the bit I want to use and set the depth for 1/4 or 3/8 and the machine will cut one end as usual and and ask if I want to keep the setting which I reply yes, but then it finishes the other 3 sides deeper then the setting I wanted which leaves the board with a smaller size cut on the original end? I have done this several times with different bits and no matter what I do the one side I started with is always a smaller cut, also if I re-cut the fist end making a deeper cut, it is always deeper then the other 3 sides? I don't think the machine is reading the end of the board right but I don't know what to do about it? Any help would be appreciated .