Multiple peaks…Is this chart correct?

Gr

I got multiple peaks on my OPKs this cycle, so there are two dates I could’ve ovulated on. The first one is what the chart says on September 26th (CD14), and the other date in question is October 2nd (CD 21). I have not tested yet. Do you think FF is correct? Or do you think CD 21 is the actual ovulation day? If it’s the latter, then I would actually be 11 DPO at the moment instead of 18 DPO. I had an HSG test this cycle that had good results, so I’m hoping this is it! Any thoughts are greatly appreciated.