How to change profile for twins

Angela
I am having twins due January 11, 2017.  Before we know I was having twins, my due date was January 25th.   I updated my profile to show I'm having twins but I also updated my due date (you don't carry twins as long as a singleton).  Now, my profile shows that I am 9 weeks along when I am only 7 weeks.  Is there a way to change my week progressions back??  I'm assuming I have to change my due date back??  I could but that date is incorrect now.  Any advise??