Me and my friends started our server i didn't notice the difference in our hearts so I just carried on to game-mode c. I found out the smite command and I did it to my friend and he said he couldn't re-spawn because it was hardcore. I unbanned him and deleted his .dat file. It worked he was back in. I went into the server properties file and the hardcore mode was false yet i was in hardcore mode in game. In the pictures you'll see what i mean. Please help!
DrewZwaggy What King said, what pictures? Also, do you have a plugin installed that would modify the game to be hardcore?