Struggling to update my period in the log?!

Hi guys I think I need someone to help, I should have started AF last week but it was 6 days late so I had deleted the period from last week but when I added the start of my new period it only added a day and then wouldn't let me extend it? Have deleted it and re added it, but still not updating so now all my predictions are off as I am still bleeding but it's telling me to take ovulation tests etc? Please help? Xx