My first question is, if I grapple an enemy wizard and then the wizard's monk body guard grapples me, does the monk's grapple on me break my grapple on the wizard?
My second question is, if I use my claws as a full attack, tacking a grapple on the end with Flurry of Maneuvers on someone already grappled by me, does that break my previous grapple, or can I claw them and still try to advance my grapple to a pin?
As to your second question you could not make a full attack on someone you have grappled. Your options when in control of the grapple are 1. Maintain grapple as a standard action and if successful preform one of the listed actions.
2. Release the grapple as a free action to full attack and then attempt to grapple them again with the Flurry.
The first question I have no absolute answer. A case could be made that the bodyguard could only aid the wizards attempt to escape under the multiple creature heading. I would see nothing in his grappling you that would force your grapple of the wizard to fail and release him.
