Glow changing my cycle chart?!

Hey there! I just logged into Glow, and all of a sudden, my chart is updated and changed. For example, the week of ovulation is now one week later and my (hopefully not) expected period is a week later. Why is this? Can I get this changed back??? Now I'm worried all my charts will be wrong from here on in! When do I test now? I'm thinking Friday if AF is "supposed" to show Sunday....based on the old Glow chart, which should have been right for cycle days.