Originally Posted by
DogHouseMom
Should I have offset matching the lines by 1/4" to compensate for the seam?
Yes. ;-)
Take the stitching out. now you can see the stitching line on both edges. Stick a pin thru the intersection of your drawn line and the ripped out stitching line on one edge, then put the pin in the other edge, matching the same point. I usually pin every other line.