So, if character A is protected by character B and C, who each have the Bodyguard talent, can they stack the benefits of Bodyguard on A? Let's say that B has two ranks and C has one, can they both use the Bodyguard maneuver to upgrade the difficulty of attacks targeting A three times?
I don't see any RAW issues with it, but something in the back of my head screams about opening up for abuse, although I can't really think of how.