Next we remember that 'dark' glyphs tend not to be counted. If we let Aa1-47 be the 1st glyph of the day and count from there, avoiding the 'dark' hokohuki glyphs, we will get this refined day calendar:

Aa1-46	Aa1-47 (1)	Aa1-48
Aa1-16	Aa1-17 (4)	Aa1-18 (5)	Aa1-19	Aa1-20	Aa1-21
Aa1-22	Aa1-23	Aa1-24 (10)	Aa1-25	Aa1-26	Aa1-27 (13)
Aa1-28	Aa1-29	Aa1-30 (15)	Aa1-31	Aa1-32	Aa1-33
Aa1-34 (19)	Aa1-35	Aa1-36

I have redmarked the reversed tapa mea glyphs, which we will leave aside. There are 24 glyphs in the table above. We have eliminated 3 because Metoro said hokohuki and we have eliminated 3 because they are reversed tapa mea (and because the newly defined ordinal numbers indicate so - 4, 13 and 19 are numbers for ends of cycles). 24 - 6 = 18.

Now we are closing in on our goal.