As for the question of was this a "provabaly fair" casino - NO, tried something different...my bad I guess

Playing on a non-PF site is just asking for trouble IMO.
Not all PF sites are doing right things (eg. dicebitco.in), but at least you can try to verify the bets and can be sure if the site is cheating or not.
On the other hand, when you get incredible rare result on non-PF sites, there is nothing you can do. It could be purely luck, or may be not, who knows?