Amazon pushed out an update early by accident, and anyone who updated is stuck on that patch.
Simply put - right now, if you've updated your Hearthstone client using the Amazon app store, you will be stuck playing ONLY with other players that have done so. At this point, you can climb ladder facing tons of horrible players. There are reports of Rank 1 players facing Rank 20s and are able to climb and hit legend easy with it. You need an Android phone or emulator and the latest Hearthstone APK. I'll post it later tonight.
tl;dr Update via Amazon APK, climb to Legend stomping Rank 20s.