Prized Amalgam (x2) and Exert Influence

Roblaf
Roblaf Posts: 2 Just Dropped In

On his turn, the AI played Prized Amalgam.  The next turn he played a 2nd Prized Amalgam.  On my turn I played Exert Influence which moved the stacked Prized Amalgams to my side of the battlefield.  On the AI's next  turn, he destroyed the Prized Amalgam.  A few turns later I played another Zombie which, I believe, was supposed to return both Prized Amalgams to my side of the battlefield.  Instead, I got one and the AI got one.

Prized Amalgam: https://beta.mtgpq.info/cards/PrizedAmalgam

Exert Influence: https://beta.mtgpq.info/cards/ExertInfluence