Ca2-10 Ca2-12

The change from 4 legs - presumably 4 doublemonths for the night in Ca2-10 - into 3½ legs for Sun in Ca2-12 should be a way to say the night (Moon) has 8 as her limit, while Sun has only 7 (= 3 + 4).

And 7 + 8 = 15, which makes me think of Aa1-15. The ordinal numbers of the glyphs at the beginning of line Ca2 ought to be compared with the glyphs at beginning of line Aa1 rather than with those glyphs which belong in the daylight calendar:

Aa1-2 Aa1-3 Aa1-4 Aa1-5 Aa1-6 Aa1-7 Aa1-8
3 4
Aa1-9 Aa1-10 Aa1-11 Aa1-12
4
Aa1-13 Aa1-14 Aa1-15 Aa1-1
4

The little child (tamaiti) in Aa1-1 is here seen as belonging at the end of the Moon season, he is her final. She has accomplished her task, created a new sun child. There are two 'cracks' on him, at his throat and at his navel. 2 could here be a way to tell the reader that he belongs to the 'back side'. Notably there is no parallel to Aa1-1 in the H/P/Q texts, and his body is formed as marama.

14 * 29.5 = 413 (Tama) means that 15 months (the first one - Aa1-1 - in the dark) have elapsed. The order of light says Aa1-15 is glyph number 14, Aa1-1 cannot be counted.

We can now colour and complete the table for the beginning of line Ca2 with a pair of tamaiti - if Moon has one tamaiti, then Sun maybe should have twins:

Ca2-1 Ca2-2 Ca2-3 Ca2-4 Ca2-5 Ca2-6 Ca2-7 Ca2-8
0 3 4
Ca2-9 Ca2-10 Ca2-11 Ca2-12
4
Ca2-13 Ca2-14 Ca2-15 Ca2-16
Ca2-17 Ca2-18 Ca2-19 Ca2-20

Ca2-11 apparently is the 10th month as counted by the light of Sun. Two children will be born at Ca2-15 (where 14 * 29.5 = 413). They are seen in the pair of tamaiti (Ca2-16--17) but hinted at already with the two bottom 'flames of the moon' in vai at Ca2-15 - they are not crescents but tao signs.

The twin birth can be interpreted as a result of the lost head in Ca2-12. This important time of the gods begins with toga in Ca2-13. It is the time when the two halves of the 'turtle' will be born, 'cap' and 'cup'.

We can count 5 in Ca2-13 and 3 in Ca2-14 (i.e. 5 + 3 = 8), because we have learned that a limb such as those in Ca2-10 and Ca2-12 should be counted as 2 - therefore the thumb in Ca2-13 must be regarded as 2.