I went to Costco a few days ago. The executive coupons are on a table near the entrance (at least at the Vaughan location they were). So you grab a booklet if you want one. I didn't grab one but had the cashier ring in a coupon for one of my items when cashing out. When I mentioned it to her, she said she knew and was going to ring it through anyway. I still don't get why these things aren't automatically discounted when they scan your exec card.
Also, Vaughan location didn't show that Hellman's Mayo was on sale this week. Sign/price showed full price of $7.xx. I asked at the cash and she said it was on sale. I tried telling her twice that the sign was wrong and she didn't understand what I was saying for some reason.