The asymmetrical plan of the erechtheion was most probably due to the fact that the structure was symbolic of erectheus' tumultuous life was an architectural experiment had to incorporate existing shrines was intended to be a rejection of the classical ideal

including the octave, the answer would 8 notes in a major scale with one note being played twice. ex) c major scale includes: c, d, e, f, g, a, b, c

notice that c is played twice

however, if you were to ask me how many different notes are in a major scale- the answer would be 7.