I just realized they'd been doing this. Their measurement instructions are definitely wrong. And they won't acknowledge that they're cutting them differently from the website instructions. So now I'm stuck with a couple I threw in the wash without thinking about the issue on.
I know, right? They tell you one thing, the website states another and the shirt you get is a different beast altogether. At least now I know how to order my next shirt. SuitSupply's cost quality ratio is still one of the best