Ka2-7--8 are at the beginning, reflecting Ka2-1--2:

A
	Ka2-1	Ka2-2	Ka2-3	Ka2-4	Ka2-5	Ka2-6
B					Ka2-1--4 are similar to Ka2-7--10
	Ka2-7	Ka2-8	Ka2-9	Ka2-10

Here - it can be argued - Rei in Ka2-10 ought to be the 1st glyph of the 1st calendar. The 2nd Rei has (at least so far) been regarded as the 1st glyph of the 2nd calendar, and the 3rd Rei seems to be the 1st glyph of the 2nd half of the 'summer' season:

Ka3-15	Ka3-16	Ka3-17	Ka3-18	Ka3-19	Ka3-20	Ka3-21
				partly destroyed glyphs follow here
Kb1-11	Kb1-12	Kb1-13	Kb1-14

Ka2-5 and Kb1-14 are identical glyphs (viri) and Ka2-4 resembles Kb1-13, suggesting that indeed also A belongs to the calendar.