Same for me as well, I have ordered 2 x 7 Plus 256GB Black, which will get delivered on Sat 17th.
I am keeping both of mine and not concerned about if it locks to the first sim I put in it, as in 12 months time if I move to another carrier, I will pay the ~£10 if required to unlock it, which it wont anyway.
Just accept the delivery and be happy

[doublepost=1473695530][/doublepost]Just received my Dispatched Notification email for my 2 x Black 7 Plus Leather Cases, which will be delivered tomorrow (13/09)
I did have 2 x 256GB 7 Plus Black phone, but cancelled them for very.co.uk (arrives 17/09), as I was quoted 27th-29th.
My original email order time from Apple was 08:11 (Midlands based)