'Status Update' query

I'd always understood that VS never release the details of which aircraft will be operating each flight until the day of the flight, for several reasons including security. But if you look at the 'Status Update' section of 'The Toolbox', it lists which aircraft are operating the VS900 and 901 flights up to 23rd March.
Just wondered if this is normal or a mistake?
Just wondered if this is normal or a mistake?