Socketed gem count vs capacity count is unintuitive and inconsistent

The game only counts support gems as "socketed" for skills that are usable with your current weapon set.

If you have crossbow and spear skills, only the crossbow skills' support gems will count as "socketed" for notables like Crystallised Immunities when you are using the crossbow's weapon set.

This means the effect can change based on which weapon is active, which is an interesting interaction but I'm not sure if it's intended.

This is all fine as far as it goes, but isn't intuitive because at the top of the skill menu it shows the skill gem "capacity" and how many of each color you presumably have socketed.

This is unintuitive because it counts gems as socketed for capacity purposes whether a skill is usable or not, but not as socketed for gem count purposes.