I've been dutifully entering Shift codes since the Pre-Sequel launched, and I should have over 20 saved up by now.
When I finally got around to visiting the golden key chest, I saw that I had only 9 keys. I redeemed a new code from today that should have added one key, but upon visiting the chest again I still had only 9. When I opened the chest, my count went down to 8 as expected.
Is there a cap on golden keys? Or is something else going on here?