Confusing ovulation tests. 🤔🤔

Lindsay • Michigan. Engaged. 27. Mother to a beautiful 6 year old girl. 💖👑 Baby number 2 due January 2019! ❤️

So this is my first month using clearblue digital response ovulation tests. (I’ve been using the cheapies off amazon.) I’ve been getting blinking smiley faces since Saturday but when I use the cheap tests I’m getting suuuper negatives, like no second line whatsoever. What’s the deal? I though the cheapies were suppose to be just as reliable?