It's the same situation I faced during my 17/3 departure. I emailed RWC and was told that there is a system error but booking is confirmed.My bookings on 7 April have been in "Booking Processing" status for a couple of weeks already.
Other cruises which i have booked are immediately in "Booking confirmed" status.
Is there a need to worry?
Because there is no evoucher while in "Booking Processing" status which the MBCC people always ask to see before queueing up.
Port charge payment had been deducted already.