Old Navy maternity clothes sizing

bear7328

I got the stuff I ordered from ON last week and I was apalled when I tried it on.  I got the same size that I usually am in store, and I double checked my measurements with their sizing chart to be sure.  The nursing tank, maternity shirt, and bathing suit tank are HUGE on me.  I think I need to go down 2 sizes.  I'm going to exchange the shirt and tank, but they didn't have any swimsuits left in the size I needed.  I pulled out my sewing machine today and took in the swimsuit on the side seams.  I had to take 10 inches out of the back of the bathing suit!  Granted, now it looks better than most of the other tankinis I've owned, but seriously, for the measurements to be that far off is astounding to me.  Anyone else have issues?