I have exactly the same problem. I only run one tournament a week, and I always copy the previous week's tournamnet to create the next week's, simply advancing the time by seven days. After I change the time, and click modify tournament, the time is still always wrong. No matter how many times I correct it, click modify tournament, log off and on again, it is still wrong. So far, onece there is only one tournament remaining, and I correct the time, it modifies correctly, but as long as their are two tournaments, it never modifies the time correctly on the later tournament. This has happened every week since I started running tournaments, eight weeks ago.