Glamour Bug

[Kirika-]

Post what leg slot gear name you are wearing and what the name of the legs are you are trying to apply as the glamor.
Sometimes the gear you are attempting to use as a glamor is restricted to certain jobs.
For example, while one can glamor a Black Mage only leg onto a any-caster leg, only if you are a Black Mage will you see the glamor. Other caster jobs will see just the any-caster leg.

Also, post what your chest and feet slot gear items are.
Sometimes the chest item or foot item "overrides" the leg slot to the point you can't exactly tell what legs are on from looking at your character model.