Assuming that a button isn't physically stuck on the side, probably the best way to have this issue addressed is with an inspection. It sounds like it's not the remote causing this, but the television itself. You can call 800-SAMSUNG and have a tech come out and repair the unit under your warranty.
Just wondering if anyone elas has had a problem with the volume going full when you turn the TV on. I turned the TV on with my harmony remote and since it's hooked to my receiver the TV volume is 0. Well I turned the TV on the controls on the side of the TV stayed on and the TV volume went to 100. When I put the volume back down with the TV remote it(TV) emitted a beeping and the red light on the TV would flash. As soon a I let go of the volume button, the volume went back up to 100. Mute wouldn't work as I would hit it and as soon as I let go the volume would be back to 100. I even took the batteries out of all the remotes and itstill did it. Recycling power on the TV did not cure the problem either....any help would be great!!