confused 😐

SMAC
so I started this month using clearblue dual opk and after 6 days of flashing face I got my peak WooHoo... DTD every day right up to 2 days after peak. tested again as hubby mentioned about being sure I was definitely not being in my fertile week any more and I tested and it's back to smiley faces? What could this mean?? I already got my peak..