I think I know what is going on with this, but I thought I'd see what anyone has to say, and add this information to the forums.
I made a weapon for Aeris - Revivial Rod. It has a status attack of Death, but it is Restorative. While testing, I attacked a Dead Party Member with the Revival Rod. The dead party member was not revived, but their HP was restored. I guess this is just because there is not a 100% chance of inflicting Death, but the Restore HP effect still worked? So my Revival Rod restores dead people's HP, but does not always revive them. Anyone have any ideas for making it revive everytime? If not then I guess I'll have to rework some things...think that restoring dead people's HP with a chance of Revival is a worthy ability to have? Would marking 'Ignore Stat Def' help you think?