Ffvii

I have played FFVII several times without the aide of cheats . . . but now, I just want to explore the beyond and use Aeris and Sephiroth at times that I shouldn't! Does anyone know why when I use the Sephiroth code 1. his name is vincent, 2. He loses all HP and the party is treated as a two person party when in combat. 3. Switching him in and out of party with PHS doesn't do a thing except cause more trouble.