Confused on edd

[Lollyheart]

i had my dating scan last week and my dates matched the size of the baby, so kept my edd as 18th of sept.
I got my nf bloods results to and it says on the letter edd 25th of sept so a whole 7 days difference

Probably a typing error! They moved my date by a few days at the dating scan and then tried to move it back again at the next appointment so I just told them I was sticking to the scan date I'd do the same when you have your next appointment!