#1 no worries the violations are on the owner of the car and Not the driver. (Being pulled over by a cop and given a tkt for a Red Light violation is on the Driver and Not the owner of teh car , so in that case you should be worried but not in yurs).
#2 thats very much possible, since Enterprise will have to pay the tkts out of its own pocket
#3 I believe if at any time in this case Enterprise does in fact submitt the proof that Amex asked for that Amex will recharge you for the tkts. Or Enterprise can simply rebill it and youd have to Dispute it all over again, from what I understand having won the dispute 1 time doesnt automatically mean it that the issuing CC will simply drop once told that
Please let us know if Enterprise does in fact rebill you, I cant see why they wouldnt
BTW if I borrow your car and get the same kinds of tkts and dont mention it to you, dont worry you will get them in the mail and be Required to pay them or else the registration can be Revoked I was told. You cant go to Court and say but Judgy steve 2 was driving the car at the time not me. Judgy will find you Guilty since the violations arent on the driver but the owner (thusly why I feel Enterprise if they have their act together will either be a callin again or simply give it over to a Collection Agency who will ramp up the amount of fees due)