Ovulation Query

I have been used the Clear Blue Advanced Digital Ovulation tests. I had low fertility on the 11th January. Then high (flashing smiley face) on 12th, 13th and 14th January. The 15th I finally got my solid smiley face peak at about 2pm. I took another one at about 7pm that evening with a new box, just because I like to check and it came back with low fertility. Is that normal? Within 5 hrs it went from Peak to Low?

Also bear in mind I have also been doing strip ovulation tests alongside them and although they got darker, they've not been as dark or darker than the control line. Did I ovulate?