When I was at Palace a couple of seasons ago and we had gone 1-0 up my main striker scoring and the score had stayed the same until half time, but about 60mins into the game we scored again but the score-line had not changed. There was no offside or any foul I re-watched the goal and saw nothing wrong with it but the goal had basically been disallowed for no reason I wouldn't of minded so much had the opposition not equalized and we drew instead of winning 2-1. It's never happened since in any match. Weird...