I’m finding it really confusing how many women with very faint tests are saying they’re due 1-4th October?

I’m due on 4 October but I’ve known now for 2.5 weeks and that was cycle day 28. I also ovulated late around cd 19. I saw the sacs and fetal pole last Tuesday and I’ve had a 3+ on a digital, so I know I was on track for my stage.

So I am just confused how women finding out over 2 weeks later and still clearly very early as tests are faint are being placed with due dates so early in October?

Genuinely intrigued- maybe this is why so many people are disappointed at early scans if these apps are suggesting they’re much further along than they are?

Or maybe I’m missing something 🤔