2 peak fertility rounds in the same cycle?

[SummerChild022]

Hi all, I’m quite new to tracking with ovulation strips. And have had the following:

6th - low fertility
7th - high
8th - peak
9th - peak
10th - Low
11th - Low
12th - high
13th - high
14th - peak fertility
15th - peak fertility

I'm so confused? How do I have 2 seperate times of high fertility?

Unfortunately my partner is away on a business trip during the second surge, so feeling upset that we’ve missed that one.

the last time we were able to do the deed was on the 12th.

thanks in advance.

This happened to me once. I'm not sure if this is fully correct but I read somewhere that if the ovary fails to release an egg then it can try again in the same cycle, hence the 2nd peak. Not sure though and hope someone can clarify.