Response from LEGO SHOP
16 December 2015
Jordan - Core Product Specialist, Consumer Services
This set recently received a redesign and there was a new element made for the front and back windscreen. For the past year the windows did protrude into the vehicle by one stud and it went unnoticed because it matched the building instructions. Now we have a new building instruction, with the new element, but it seems you still received the old elements in the box. I am sorry to see that the launch of the new building instruction did not match up with the launch of the new part.
I am glad to see that you have reached out to LEGO Consumer Services as they will definitely be able to assist you with getting the new parts.