Noticed that the Grade VII materia potentially has the incorrect effect, so currently it seems a waste to spend Cracked Planiclusters on them.

Savage Aim Materia VII (+20)
Savage Aim Materia VIII (+60)

However;
Savage Aim Materia VI (+40)

It's the same with the other materias as well if you check the trading vendors. If anyone else confirm this that would be handy for devs.