Maybe you got a bad chamois. Take them back, for over $100 you should be comfy. Compare your bad pair with another in the shop and see if they all have the offending edge. It could just be that your shape is not compatible with the chamois shape.

That said, one time I got a deal on a pair of barely used PIs at a consignment shop. I found out why I got the deal, there was a wicked sharp nylon thread that stuck out of the perimeter of the chamois! Ow! That is so say, sometimes stuff like that slips through QC. I was able to snip the thread down with nail clippers. But then I *graduated* to the next size up!!