There are three versions of the B-Max. Studio, Zetec and Titanium. These are also called Trims. Under what you have seen, I would imagine that they have built the standard parts of the car (everything that is the same no matter what trim you have), and the next step is to fit the requested trim modifications to the car. Finish probably just means quality control to make sure everything has been fitted correctly, and then signed off as complete and ready for shipping.
The fact that this is still present on the website, even though you have taken delivery of the car last week, could mean that someone needs slapping and forgot to update their records.
This is all speculation.