I just received the Gold tier 4 reward this morning at the weekly arena reset and when I went to start playing the game found that I was now sitting in Gold tier 2. So I checked my Defense battle log and only showed 2 fights in the last 12 hrs....both of them losses. So, when I went to bed last night I received the reward for Gold tier 4 and then lost 2 fights and woke up to Gold tier 2.

What am I missing???