There's already another thread about this exact same thing a few posts down from yours:
Has SE Addressed Stat Allocation on ACN Yet
: /

Summary:
This is the "penalty" for not having to level up 2 classes.
Square has addressed it and said that it is intended and that other classes will have to deal with the same issue once there are 2 jobs available for other classes.

You can deal with it in several ways:
1) Farm a bunch of stat reset tomes.
2) Put 15 in MND/INT to lessen the blow when you switch.
3) Put your points into other stats that both SCH and SMN can benefit from like PIE/VIT.