So Confused.

Okay so here is a picture of my opks. 10/1 was the first day I recieved a positive opk & I took another test that night & it was also positive. I took another one the next day 10/2 and it also was positive. I took an opk at night in 10/2 and it had the darkest lines out of any test. I've read you ovulate 12-36 hours after a positive opk so I'm confused which day I ovulated since my 2nd day test was the darkest... Help???