I have just purchased a few flights with Singapore Airlines, and my (new style) DC number was rejected online. I went ahead an bought the tickets anyway, and am now unsure how to get the number attached to my booking. Anyone have any experience with this? I cant find anywhere on their 'my bookings' section to add the number.

I am sure I had seen a thread regarding this problem before but cant find it.

One of the flights is only in April next year - wondering if I should risk putting a DC number on this one in case we are part of M+M then - wonder if there will be a lot of missing miles?

Thank you for your help!