Are you sure you spent $50 before tax? That happened to me a few weeks ago. The clerk said I did however when the final bill came he was wrong and the points didn't show. that's the only way I can think of that you would not have received the 20x's. It's a fairly big loss.All offers were loaded to my card/app, I scanned it before I scanned my items. I did receive some points, but i did not receive either offer. Guess I'll just wait and see!
Sorry it happened.