Please help...

Cara • Expecting our first baby Jan 1st 2016! Married my best friend after 8 years together 10/10/14.
I'm very confused! I've had 3 somewhat positive ovulation tests in the last 3 days. I know I can't be ovulating for 3 days though. Does one look stronger than the others? Or does it look like I haven't hit my peak yet? I'm confused as to when I did or will ovulate and I'm trying to log it correctly in GLOW for future reference. What do you think? 
This was two days ago...
This was yesterday...
And this was today...