Of course he "stacked the deck". How else could he win his challenge against Satan over universal sovreignty.
This was something that always troubled me as a JW. According to their theology, God created them perfect, in his image. And then the issue of sovreignty was raised by Satan, and God accepted the challenge. But in order to do so, he had to infect humanity with death and imperfection. In essence, God cheated in order to win his bet with Satan.