LH surge on 8/4 & 8/29??

Sam • Married💍, 2 boys (both are 5)👨‍👩‍👦‍👦. 🤰🏼. I love our family😍.

My cycle is pretty regular. I started OPK/OPT in July and no LH surge.. This month I've had LH+ on 8/4 (19 days after end LMP) and 8/29 (10 days after end LMP).. is this normal for it not to be the same number of days past LMP? I'm so confused.. 😒