please help: two apps have me ovulating weeks apart

Jillian
Ok, I've been charting for about 50 days or so once my cycle regained some normalcy after an August 1 miscarriage.  Now, Ovia and Glow initially had me ovulating around the same time, but Ovia recently prompted me that it had recalculated and that this months ovulation had already occurred. Based on CM and symptoms (I'm dizzy and. Aurelia today), I'm inclined to agree.   Looking at the charts, what do you think? Thanks