Here is why your bronze cross blacks all look black.
There are three base colors in turkeys. Black, bronze, and black-winged bronze, written as B, b, and b1. The black base, B, is dominant. The bronze base is recessive to black, and black-winged bronze is recessive to both. Genes come in pairs, so a black turkey has two black bases, BB. A bronze turkey has two bronze bases, bb. When crossed, each parent contributes a base color gene, so all the offspring get one black and one bronze base, Bb. Because B is dominant, they all look like black turkeys.
Why then does alogue get a bronze? Because alogue's black turkey is not BB, but Bb. The black parent has already been crossed with a bronze, and carries a bronze gene. In this case, half of the black turkeys offspring will get a black gene, and half will get a bronze gene. Since the other parent is bronze and only contributes bronze genes, half the poults are Bb and look black, and half the poults are Bb, and are bronze.