Not cheating. You got disconnected and for whatever reason the client on your end didn't realize that you were disconnected.
If you are on the website and it seems like your opponent stopped playing, you can force refresh to verify you are seeing the most up to date board and haven't been disconnected.
Played 2 games with this guy, as he was about to loose he stopped playing. After 5 min i realised my clock time was reduced to less than a min and i managed to loose both games .. Not fare.. And not sure how he managed to cheat..any suggestions