Ovulation tests - clear blue & tesco saying different things

I’m so confused!

I’ve been trying to track my ovulation & been using the clear blue digital and for the past three days I have had high fertility (flashing smiley face). I ran out of the test so brought some others to keep track from tesco as didn’t have the ones I wanted and on the tesco ones there is no line what so ever.

I’m so confused?

Have I missed ovulation? But then why have I had three days of high and no peak?

Any suggestions would be so appreciated! Thank you!