End of period no. 12?

Following after Sb2-31 we will find:

...
Sb2-32 Sb2-33 Sb2-34

These glyphs seem to have a separate meaning, not continuing the pattern which I perceive to be ending with Sb2-31.

Moreover, in Tahua there are two sequences which seem to be in parallel with those above:

Aa4-12 Aa4-13 Aa4-14 Aa4-15 Aa4-16 Aa4-17 Aa4-18
Ab1-14 Ab1-15 Ab1-16 Ab1-17 Ab1-18 Ab1-19 Ab1-20