I don't really care, but it's a geometry problem. The wide stripe stickers are cut from a flat sheet, and are being spread over a curved surface. With typical narrow stripes, it's not an issue because the narrow width means one axis of the sticker stays relatively flat, and it only has a significant curve in the front-to-back direction. But the wide stripe has to curve both front-to-back and side-to-side. The way around it would be to stretch the sticker slightly as it's applied, to even out the distortions to conform to the flat surface, but that's a pain in the ass. Try covering one side of an apple with a 3x3 inch square cut from a bumper sticker to understand the effect.
And because of the "stretch" necessary to get the flat stickers to conform to the curved surface, a sticker that appears to have been applied flawlessly may later contract back to it's original shape, resulting in "puckering" at the edges. That puckering could also result from contact on the helmets during the game.
The most robust solution would be to paint the designs on instead of using stickers, but that's kind of pointless for a design that is only used a couple of times per year.