I'm sorry you're so frustrated. I have to say that I don't see two sets of highs and lows on your chart either... it seems like a lot of ups and downs, but no clear shift to a second set of much higher temps, kwim?
Even the temps after your cover line are not higher than your highest temps earlier in your cycle... so I'm a bit stumped. I'm not really sure what's going on this cycle... but I hope you get some answers one way or the other very soon.