Help! Can you read the stick from a digital test the same way you read wondfos?

I used the digital test last time when we were TTC DD. It turns out I was ovulating late in my cycle (CD 21) and I was terrible at reading wondfos. I got pregnant my first cycle with the digital OPK.

This time I got the "advanced" one. It's supposed to show you three blinking smileys on the days leading up to ovulation and then a steady smiley on your "peak" fertility day.

I started testing on CD 11. I skipped CD 12. Got an empty circle on CD 13. I was super surprised when I got a blinking/high fertility smiley on CD14. And even more surprised when I popped the test out of the reader and the second line was really light. Today's CD 15 and I got another blinking smiley and a light line.

Does this seem like I messed up the test by skipping a day? Or like I am actually going to ovulate earlier? Should I stop popping the tests out to read them and trust the reader?