Do the Warlord class abilities that provide their Charisma bonus to saves stack? I believe (though I can't find the link) that in the past double stacking of abilities has been disallowed.
Rallying Presence: The sight of a warlord on the battlefield is enough to strengthen the hearts and wills of those who fight beside him in battle. At 5th level, the warlord may add his warlord initiation modifier as a morale bonus to Will saves versus fear, death effect, or compulsion effects to all allies within 30-ft. of his position. If the warlord maintaining this presence becomes cowed, frightened, panicked or falls prey to a hostile mind-affecting ability (such as one that would stun or daze him), compulsion or death effect, this presence immediately ends.
Force of Personality (Ex)
At 3rd level, the warlord’s forceful personality and bold, headstrong nature assist him in resisting the influence of others. Where others use personal serenity, awareness of the world around them, or plain old sensibility, the warlord gets by with endless nerve. The warlord may add his warlord initiation modifier in addition to his Wisdom modifier to determine his Will save bonus. If the character is ever able to add his warlord initiation modifier to his Will save through use of another ability (for example. the paladin’s divine grace) he may only add his warlord initiation modifier once to his Will save.