Changed O date after MC

Glow originally calculated my O as occurring on 2/15 which made sense with my bbt and opk. However, then my period was late by a week. I logged a positive preg test on 3/4 but it ended up being a chemical pregnancy. So now that I’ve started my “period” a week later, Glow adjusted my O to 2/20 which is impossible (we only BD once on 2/13). Glow has been confused by my late period and positive test.

Why does the app do this? How can it be fixed because this is highly inaccurate?