Final Fantasy I - Redux

Just to confirm, what Madsiur suggested about removing the character from the party and then replacing them completely works. I just did that to successfully switch Terra into a second Locke.

Update: I completed the job selection system which works almost perfectly, except for one major hitch. If you use more than one of the same actor(s) in the active party when you enter a battle it does not load the different characters, but instead loads a copy of the character.

So for example, if I have put two thieves in my party (Thief replacing Locke's actor data), one in party slot 1, and the other in slot 2. I can have them with different stats outside of battle and equip them with different equipment, etc. But when I enter battle the game loads two copies of the Thief in the highest slot. I'm assuming the issue with this is that the subroutine for loading battles loads the actor data instead of information from the active party, so altering the actor changes both. Is it doable to alter this subroutine to load the active party members instead of the actors? I've got a few ideas myself on how to fix this, but if anyone knows for certain and is willing to point me in a general direction that would be greatly appreciated.