Sounds like you mixed your parts up. The top of the jig should be for fronts & backs & the front (vertical) holds the sides. If you size your parts 1" + 1/4" (2-1/4", 3-1/4", 4-1/4", 5-1/4" etc for PC jig.) your joint will be centered with half pins top & bottom. It helps to mark on a piece of tape & tape it to the cam locks what parts go where. You should also be machining odd corners on one side of the jig & even corners on the other side. You can number corners clockwise (2,4 & 1,3 are machined on opposite sides of the jig). Inside of your parts should be facing up. Your tops or bottoms (pick one) of your drawers should be against the stops.
Have a nice & safe day!
Last edited by jlord; 12-31-2011 at 02:02 PM.