Mostly random number generators are fair and pass every statistics test. The problem is that the generator has to be initialized somehow. After all, this is done by a computer. However complex the calculation, if you start with the same data you end with the same results, in this case the same "random" sequence. So what is mostly done is to initialise the generator by reading the system clock. Which works fine, provided you do it only once, maybe at system boot, and not game by game. I'm only guessing as to what might have happened, I have no idea how things are implemented here.

The fact is that two games are identical, which statistically is totally impossible.