I seriously have doubts that these machines are geared to screw anyone over when they are dealt big pairs. The casino has no interest in seeing people take "bad beats" or pick up big pots they didn't deserve. Most likely you are seeing some crazy outcomes due to the high amount of hands the machine is able to process in a short amount of time (compared to a human dealer). I bet the producer of the machine/table could provide plenty of documentation to prove that the electro-cards are dealt just as randomly as a human would throw them at you.....