so timeline (Japan time):
7.00am - Event start, (a) Glitched one distributed
4.00pm - Replaced, with (b) fixed one
4.30pm - They added a new one, which is (c) fixed one + different WC ID
(a) was completely replaced by (b).
While both (b) and (c) are online right now, I assume codes for (b) can no longer be received.
Reason for that is, purpose of (c) is for those that received (a), can also receive a fixed version.
Also, serial codes aren't usually programmed to connect to multiple types of events concurrently (usually programmed to be locked to one wc ID),
so chances are only codes redeemed from 7Spot before 4.30pm can receive (b),
and any newer 7Spot codes will receive (c)
Also: