Ultrasound questions!

Megan • Expecting our first 9/10/16
Help! So today we had my first ultrasound! Yay. But the tech couldn't disclose anything to us, the doctor will call us later this week. I noticed that at the top the GA (gestational age) is 9 weeks 6 days but lower on the screen it said 8 weeks 5 days. The second estimation wasn't included in the ultrasound pictures they sent home with us. Can anyone explain what that age was?
Thanks! I'm new to this and I'm soooo curious to know what that means.