Clearblue Digital OPK Question

Chica • Trying for #2
We used it this month. I had two days of non-peak, followed by one day with a blinking smiley and the following day it was a solid smiley. Is it normal to only have one blinking day followed by a solid day? Is this particular test even that accurate at predicting ovulation? It claims to give you 4 peak days. I'm not sure why, but I'm questioning whether I was even ovulating that day. I tested first thing in the morning each time, like the instructions told me to.