The same way of resolving apparent contradictions applies in the case of the lights of the ear, the nose, the mouth and the eyes. In one place it says that they are the four letters of the Name of HaVaYaH. According to this, the ear is Yud, the nose is Heh, the mouth is Vav and the eyes are the last Heh (see Etz Chayim, Shaar Ozen, Chotem, Peh 4, 18a and Derushey Nekudot 8, 34b). Yet we find that the ear, nose and mouth are all only the first Heh of the Name, i.e. SaG (Derushey Nekudot 8, 34b).
The apparent contradiction is resolved through understanding that the divisions are according to the need. Thus on the level of the particular, the ear-nose-mouth are the category of SaG, the first Heh. Yet all the different divisions are arranged under the order of HaVaYaH, blessed be He, and thus in general the ear, nose, mouth and eyes divide up according to the four letters of HaVaYaH.