If you bought NON-RENEWAL certificates for standard Annual passes, you'll get Platinum passes when those certificates are 'activated' by the computer.
Yes, standard Annual certificates are being activated to Platinum passes.
I sent a couple of texts to people who are still at work, and the answer I got back was that renewal certificates are being applied to the renewal of an equivalent pass (seasonal = silver, annual = platinum, premium = platinum plus) and the price difference is being 'vouchered off' meaning the guest pays nothing additional. This makes sense to me since it's how we handle other renewal certificates that are worth less than the actual renewal, like AAA discounted renewal certs.