I feel bad for you guys, your dealer definitely messed up when amending your orders or didn’t have the necessary experience. I ordered back in August and soon as M Sport became available he altered it on the same slot because all it means when it’s at 060-090 status is secure a slot for a build. Not specifically for the car until close to production.
My car has now arrived at dealer and I’ve pushed collection back another 10 days no issue. Just seems like it depends on the dealer handling your order, personally have had a great experience at Berry BMW.