Help with clear blue advanced ovulation test

Has anyone used clear blue advanced? When my wife and I were TTC 4 years ago I used these and it was right on track. 2 days of high then boom peak. We were going to try again for baby #3 last year and when I was using the clear blue advanced I stayed on high for like 8 days!!! Then finally hit peak. I thought it was because I was breastfeeding so bc buying vials of sperm is so expensive we decided to wait.

Well it’s been a year and it’s happening again. I’m on day 5 of high. Has this happened to anyone else? I don’t understand why this is going on. I did breastfeed my last baby for 3 years but he’s been weaned for about 5-7 months now.