When did I ovulate?!

A

According to Glow I ovulated on 12/8. I did get a positive ovulation test on 12/7 though. That being said I would only be 9 or 10 DPO, but got a pretty clear positive pregnancy test today... With my daughter I got a very very faint positive at 10 DPO. Do you think I ovulated earlier than the 7th or 8th or can it be normal to have this dark of a line at 9 or 10 DPO??