Seems your dealer had an order already scheduled and they modified that production to match your order, so your order went into production quick. Once it enters production (status code 150) the order cannot be changed, but before it enters p[roduction, the order can be changed/corrected to match what you want.
For some, depending on the dealer's available slots, it can take a week or a couple weeks to enter production from the time the order is placed, so there is more buffer for the order to be changed.
Congrats on the new car order though, the wait is tough, but it will be worth it in the end!
2011 335d Le Mans Blue Black Leather/Aluminum Premium M-sport w/ Paddles Heated front seats, Navigation, Comfort Access Split Fold Down Rear Seats Harmon Kardon, Ipod/USB, Sattellite Radio, Alarm
Picked up at welt on March 2011 : pictures of car during ED
Redelivered May 2011 : Pictures of Car after Redelivery