Any glow admins around?

Hi. I'd like to know why Glow says my luteal phase is 20+ days long? When it's supposed to be 12. Last cycle I reported no LH surge where Glow predicted my fertile phase. I later logged a positive opk and even then it didn't consider the fact that I was ovulating later than it predicted.

I have set all my info correctly and this is the only app that is too stubborn to realise that it's wrong. Help?