Sorry, just read my post back, yes, it is a coincidence then... as both week 33 and both changed status at the same time, sorry, teaches me for posting before my first cup of coffee on a Sunday morning.
Appreciate the build can start at any time in the week, but their weeks run Sun to Sat, so for it to change Sat night to build means its rolled into 34 surely?? Not the end of the world of course, and could just be the way their tracker works, as it now states 4 week time for delivery roughly, so have to wait and see for the next status update.