I was running a local 10k this morning and at the first turning the Marshall directed all of the runners down the path to the left. After about 20 of us had made our way down to the left (I was in about 5th at the time) the Marshall realised he had made a mistake and called us back to send us down the right hand path. so me and the runner next to me ran the 50 yards back and joined in about halfway down the pack on the correct course. In the end I was the first person to cross the line but after hanging around for an hour after I was told that because some of the other runners had run quite a bit further before being told they were going wrong and had kicked up a fuss, there would be no winner announced and had to go home empty handed. Is this normal practice? I've come in the top 10 quite a few times but never first.