ovulation and AF

Okay so I have to ask. This is my first month using glow. Well I was suppose to have AF show up June 25 and ovulate June 10, well I didn't get a positive opk until June 15 which when I'd log no lh surge on each day it pushed ovulation out two days and then pushed AF out further too. Well since glow said I would ovulate June 16 after finally getting a positive opk glow now says i won't expect AF until June 30. My question is, is has this ever happened to anyone else?