Frustrated with ther period & fertility part of glo.

I have a flower calendar that I used before I found glo. It had options to input your period & sex like glo & would tell you when you're supposed to be ovulating, but it didn't have all the other options I really like about glo, like being able to enter emotional & physical symptoms & all that.

Anyways, the old ap accounts for when I have longer cycles & usually is spot on for when I should start or very close. My last 4 cycles were 28 days, 28 days, 25 days, 36 days. This month the old ap says should have a 30 day cycle, but glo said it should be 26 days. I haven't started & I'm 31 days now. They differ on when I ovulate as well, by several days... I know I can take ovulation tests to figure out when I'm ovulating, but I can't figure out how long I should wait before testing. & also glo keeps suggesting I haven't entered my period, as if I forgot or didn't do it, but I haven't started. Is there an option to let go know I haven't forgotten to enter my period, I just haven't started?