Yes, customer service told me about the cap when I phoned wondering what the heck was going on. Unless they goofed up, it was in the fine print issued with the card long ago, but the question is whether they can print something contrary to the official terms month after month on the statements and disclaim responsibility for misleading their cardholders. I really don't think so. Ccardholders have a right to rely on what's printed on the monthly statement: it's an official communication from the bank.
I expect that this will work out OK for me, but I'll let you know either way.