Think I’ve worked out why it’s happening.
Log in , choose upcoming cruises -coreect loyalty number, correct tier level & points pre-February are displayed and are correct. Must be taken from the old database.
Log in, start to book future cruise, select passengers, cabin until your name & symbol appear top right. Press the symbol, details incorrect. Zero points & basic level, joining date- the date you first accessed the new website., loyalty number wrong (number must be the number of people having joined the new website) Must be taken from the new database.
At some stage, sooner rather than later the old database will be merged into the new database and Voila.