Clear blue ovulation tests

I've just started using clear blue ovulation tests. Yesterday (cd 9) I used the 1st one. It came back with an empty circle (not ovulating). This morning I used a 2nd test and it came back with a smiley face (peak). I took them both at the same time using first morning urine. I'm curious because I didn't even get the one in between those (high...or elevated. Whatever they call it) does this sound normal? Has anyone else gotten readings where it goes from low to peak like this??