Super confused... second positive opk after clear positives?

Color me confused! Thursday and Friday I got CLEAR obvious positive, test line darker than the control, and the same on Thursday even darker. This also lined up with glow's prediction of ovulation for me. Saturday was a negative but still pretty dark and yesterday a light negative. Now today it's another positive! Not darker but the same as control line. Photos in order. Plus my temp chart... I'm so confused.