This behaviour did not surprise my wife for some reason:
I ordered an i5,8G/256G right after the keynote and online store opening on June 10
I cancelled and ordered the same, but with the i7 just after midnight that evening.
On June 12 around noon, I came to my senses and cancelled, re-orderd with the i5 again
On June 14 I reconsidered my reconsiderations, cancelled and ordered with the i7 all over again. But this time I sprung for expedited shipping to make up for my shenanigans
Almost immediately after that the order went to the next step and I was unable to cancel if I had desired. Probably a good thing
Cheers!
Glen