-If you complete Blood of the Phoenix, the immortal promotion is applied to any great people you have, allowing you to use them twice
-You can open a treasure chest with multiple units selected, and each unit will open the chest, resulting in multiple rewards. I was able to get 3 pieces of equipment from one chest this way.
The first is not a bug. Many of us thought it was, but Kael stated he thought it was OK; you cast a tremendously expensive ritual, you get the benefits. Note that the effects of the great people probably are less by that point in the game. However, I admit I think it should be changed but it isn't a 'big deal' to me.
The second appears to clearly be a bug.
Best wishes,
Breunor