Use update instead of replace.
Also, you do not need to specify all columns if you set values in correct order, and format with %i for integers instead of %d.
Code:
INSERT INTO 'users' VALUES ('%s', '%s', '%i', '%i', '%i', '%i', '%i', '%i', '%i', '%i', '%i', '%i', NOW());", steam, GetSecureName(Name), pKills[id], pDeaths[id], pHeadshots[id], pAces[id], pMiniAces[id], pMixPlayed[id], pMixLost[id], pMixWon[id], pMixDraw[id], pPoints[id]);