Something

//---Place at the top
#define CHECK_WAIT 10000
new gCheckpointTimer[MAX_PLAYERS];

new Float:gChecks[2][3] = {
{2297.1064,2452.0115,10.8203},
{2297.0452,2468.6743,10.8203}
};


//---place in OnPlayerEnterCheckPoint
if (gTeam[playerid] == TEAM_ATTACK) gCheckpointTimer[playerid] = SetTimer("IncCheckpoint", CHECK_WAIT, 0);

//---Place on its own
public IncCheckpoint() {
gProgress++;

			for (new i = 0; i < MAX_PLAYERS; i++)
		    {
			    if(IsPlayerConnected(i))
		 		{
			 		if (gTeam[i] = TEAM_ATTACK)
			 		{
			 			SetPlayerCheckpoint(i, gChecks[gProgress][0],gChecks[gProgress][1],gChecks[gProgress][2],5.0);
                                               KillTimer(gCheckpointTimer[i]);
			 		}
	 			}
			}
}


//Place in OnPlayerDeath and OnPlayerDisconnect
KillTimer(gCheckpointTimer[playerid]);