Yoke not wide enough

This is the first O&S pattern I've had quite a lot of trouble with. I got the leg pieces sewn together; but when I went to match up the yoke with each leg, I found that the yoke pieces were too short by almost 2 inches. I do tend to use narrower seams than are stated in the pattern--due to my quilting background, I lean naturally toward a 1/4" seam and have to remind myself to leave more room when sewing garments. But that couldn't have accounted for the large difference. I added some more of my accent fabric and finished the pants, but I do plan to check to see if perhaps I traced the wrong size yoke. Anyone else have this problem?