I had an issue with my pass at Carowinds in 2011, I instantly renewed my pass on the KI website, and we went to Carowinds before KI opened for the season. They made us pay 10 dollars to park, which was refunded, and then GR had to do give us comp tickets to get into the park the first day. The second day our Passes scanned at parking and at the gate.
My friend's CP PP wouldn't scan at KI on opening day last year, since CP wasn't open yet, but they gave him a comp ticket to get in. I renewed my KI PP today online, I hope I don't have any issues come April 27th.