The first objective in beyond chapter 20 is to get Neptune to rank 13, but this seems to be a mistake (either in number or in order). The 4th objective is Sirius rank 7, which costs as much as Neptune rank 12 (much less rank 13).
Because of this, I suspect that the Neptune rank is supposed to be 11 or 12. If this is not the case, that objective should be placed after the Sirius objective.