I think so, never really checked. On one account, I got eight items, on the other, seven. They both had the mask and the three abyssinal items though.
That's happened to me like 3 or 4 times.... only 7 rewards. I always got the 3 abyssinal armor pieces and a mask, but only 3 weapons. The first time it happened I thought I'd done something wrong in my Ur battle. As we all know, it's just random whether you get 3 or 4 weapons -- though most of the time you get four. :)