All stat points are linked to base class since you are given them before level 30. I understand your pain in this. That's probably the biggest issue with having 2 jobs derived from 1 class. No other job has that issue since no other class spawns 2 jobs.
It'd be nice if they changed it so SMNs could put all their points in INT like BLM, but I don't see it happening soon, if ever.
What would you do with all your points if they did implement this?