There was a heart flush on the board ( A K 5 10 and 7 ) of heart. I had the J & 10 of heart in my hand the other guy had none. I was told that it was a split pot. Was I cheated ?
More likely you need glasses. Looks to me that you actually had TJ of DIAMONDS. There is only one ten of hearts in each deck, so it wasn't both in your hand and on the board. You'd be surprised, I estimate this actually happens to everybody about once a year if you play regularly. I've seen it hundred of times personally.