Help! Bbt charting and ovulation tests !

Okay so this is what I'm assuming is a positive ovulation test and if I am correct you don't usually ovulate until 24-48 hours after your positive. For the bbt charting (this is my first month tracking) I am assuming I read the instructions correct and you take your temp as soon as you wake up and when you ovulate normally your temp drops. So my question is, was the drop when I ovulated or should it have dropped more than what it did? Or am I wrong on how this works all together lol