LH surge on CD13 and CD20

Hello,

Need some advise. So I have my first LH peak on CD 13 (have a 28-30 days cycle), after that temp continue to rise so I assume I ovulated, but out of curiosity, I just went on a LH strips again and it gives me another peak (it was high yesterday). Now I’m wondering have I ovulated? Can it be delayed ovulation or can LH surge twice ?