If this is the case, do what a lot of us do.
Before shooting, pound the butt of the stock down to the stitching to begin with, so there is no movement except straight back when the rifle is fired. OR, fill the rear bag ears so there is enough sand in them so the butt remains at the same level when the stock recoils.
The stitching between the ears is usually sewn so that it is 1/8" less wide than the width of the stock. For example, if the butt is 1/2" wide at the bottom, the stitching between the ears is 3/8" wide. The 1/8" is pretty standard, however, since these bags are sewn by humans you get some variation. The variation can be corrected, in most cases, by varying the amount of sand you place in the ears. If you can't solve the problem with sand, send the bag back.
I had a stitching problem with an Edgewood recently. Jackie Snyder took my requirements over the phone, and then sent me a new bag [in about a week, no charge], even before I could get the old one back to her. She wants her customers happy. Great Folks, Outstanding Customer Service!