What could be causing an output to output twice?

In studio this glitch is non existant. When i play the game, All my outputs are outputted twice. https://gyazo.com/3b5a735c91811edc7c7d1753e95974e1

I can show you some parts of the script too, if you can specify what part

--[GAME STARTING]--
RemoteFolder.GameStarting:FireAllClients()
for i,v in pairs(game.Players:GetChildren()) do
v.Character.Humanoid.WalkSpeed = 0
v.Team = AliveTeam  
end

print('Game Starting')
wait(GameStartingLength)
for i,v in pairs(game.Players:GetChildren()) do
v.Character.Humanoid.WalkSpeed = 16
end