Glow calendar

Brittany • Just got married in March. Expecting our first baby April 2016! Already a momma to 3 fur babies.
I told the app that my OPK told me day 11 (July 12) tested as peak fertility, but my calendar still shows that July 18-22 as the fertile time on the calendar. Should I follow the calendar or the OPK? Will the calendar change based on the test results? I use clear blue digital prediction.