The players had all twelve skills identical, identical salary, and identical DMI. They had different names, pictures, and potential.
My inference is that the same seed was used to generate the twelve basic skills for each player. The fact the DMI and salary were the same suggests that there are no differences in partial skill levels.
I'm not going to bother to estimate the probability that three players in one draft would end up like that by chance.
Here's the old bug thread, btw:
(29244.1)