!! help! CLEAR blue digital OPK, high fertility AFTER peak?

BabyDTTC

On day 9 of my cycle I got a solid smiley face on Clear Blue opk digital.

I thought it was strange so early in my cycle to get a Peak?

So after 48hours I started testing again

Yesterday, day 11 of cycle - it was low fertility (just a circle, no face)

But then today, day 12 of my cycle, it was a flashing smiley face showing high fertility?!

Question is :

Why would I get a peak on day 9 , nothing on day 11 and then high on day 12?!