Problems with on-line bookings - unit lengths.

We've just tried booking a week away using the online booking facility - and failed as the booking procedure knocked us back on the length of our unit.  On the web site description it gives a max. unit length of 8m  at the Morn Hill and Daleacres sites. 

However - in the printed site guide book Morn Hill is given as 11m and Daleacres is given as 9.2m !!

Is it possible to have the web site data updated in line with the printed data (or vice versa) so that we know where we stand with bookings as our Adria is 8.35m long.