confused... what happened...

So I've been using this app on my Iphone and I just downloaded it on my extra Samsung phone.. before I did that my tracking (calender)stated that I ovulated on the 8th and my AF was to be here on the 22nd. But since I downloaded and signed into my account on my Samsung my "log"/calender states that I ovulated on the 13th and that my AF is now the 27th. Has anyone experienced this before..? Help, TIA. Now, they BOTH say the same dates but that I ovulated on the 13th and AF is expected the 27th.