Two other possibilities if the user has been a member for a long time.
1. The clubs were purchased before the change to the level system was implemented.
2. Right after the change to levels was implemented WGT opened up the pro shop for one weekend because they arbitrarily promoted many to tiers where we were unable to even reach the fairways in the tiers they put us in. We didn't earn our tiers through our play; they just stuck us there. They dropped the level requirements for one weekend, allowing us to purchase higher level clubs that allowed us to continue to play.
Either way the member would have to be a long time member that hasn't played many rounds. Otherwise they would have "leveled-up" to their clubs by now.