2. Since "before me" is the last phrase, adding a "before your face" for repetitive emphasis does not change the meaning either. See When Critics Ask p.370 for more info.
2. Kwa kuwa "mbele yangu" ni msemo wa mwisho, kuongeza msemo "mbele ya uso wako" kwa lengo la kusistiza kwa njia ya kurudia hakubadilishi maana pia.