Dave, I have the same problem. It shows me as platinum, when I am diamond now. I have called them twice over that last several months. Both times they said, "we are working on it". Rarely can I even log into see my status. I just logged in, and it did not pull up my status. Whatever!!! They did confirm we are diamond now, I guess that is all that matters. There C&A website is not worth the frustration in my opinion.
I do get my saving certificates via email. Oh well, as long as they know we are diamond, I won't fret too much over it.