If I charge an item after INVOKE #, I remain linked to the orb, but it is now set to discharge all mana.

Furthermore, FOCUS is not accurately indicating if an item is set for cyclics or general use;

>invoke orb cyc
The cambrinth orb pulses with Elemental energy. You reach for its center and forge a magical link to it, readying all of its mana for your use.
Roundtime: 1 sec.
>focus orb
You focus your magical senses on a cambrinth orb.
A magical field surrounds the orb, which should last for fifteen roisaen.
Your link to the cambrinth orb is intact. You are focused on drawing mana for all types of usage. You clearly perceive 30 mana streams bound within the orb.