its like to stop gangs from fixing it, they put on a large bet on a housemate who isnt at good odds to stay/win and then they cast a few thousand votes (all this phone in money will be made back if the housemate has really **** odds)...so channel 4 will know that no one person will vote like 1000 or 2000 times so they put this rule out, if there is a mobile number that appears 3 times or 33 times then they wont see anything wrong with that and the votes will "be counted and VERIFIED"
