Actual ovulation...is this right?

Stacey • One boy, one girl, Two in Heaven and another on the way. Endo Warrior, Bicornuate Uterus

So I am really trying to figure out when exactly I ovulate. I don't temp I do OPKs. Usually I get a positive OPK around CD 11. When I input my OPK Glow says the next day is ovulation, which I get as it happens 12-36 hours after first positive OPK.

My question is, my period is "late" according to glow by 1 day every month, making my luteal phase 15 days. So I am thinking I actually ovulate approx 36-48 hours after first positive OPK...does that make sense?