ClearBlue OPK so confused!

Last cycle I used Answer brand and got a positive on CD19. This cycle I am using ClearBlue Digital Advanced. I'm on CD7, literally my period stopped 36 hours ago. This is what I got today using FMU as it instructs. I'm so confused. My cycles are usually 32 days, have been for 6 months. And last cycle I O'd on day 20. This is only my second cycle doing opk, but doing CM in previous cycles I could guess I O'd on days 16-20. Never on days 7-10. Anyone else experience this with ClearBlue? ​