Riley, I did find the FAQ for pack size
Q: Under Giant Rats (p.95) is: "Pack Size: You can recruit as many Giant Rats as you wish." What does this mean? Can I have more than 20? No other answer seems to make sense. Since rats cannot get experience, there is no special benefit to having large groups of them. If it really just means that the Henchmen Group does not have to be 1-5 models, then why make this a special rule at all? Is there a benefit, beyond experience, to having large Henchmen Groups?
A: It takes up less room on the warband roster sheet. Pragmatic and simple. [Games Workshop Official Mordheim's FAQ]
You were correct. I apologize for questioning you. Also, I think you already know this, if you have a model armed with a pair of fight claws he may not use any other weapon during the game. Fighting in a combat offically states that you must continue using the weapons you start a fight with except for the following exceptions: Guns and Lances. Because the weapons only work in the first round of combat after that you would naturally resort to using the melee weapons. Other than that you are stuck with the choice you make in the first round.
You can equip any model with the following in reguards to your personal armory. 2 hand weapons, 2 ranged weapons, and armor. Models always carry the free dagger, this is an exception.
I did also find the FAQ on the multi mutation question, its pretty bad like we thought:
Q: Can you take a multiple of the same mutation so that each one gives you a benefit? For example: Tentacle twice for -1 Attack per tentacle.
A: Yes. However, in order to get three Tentacles, you must first buy the Extra Arm mutation as the Tentacle has to have an arm to grow from. You can have multiples of any of the mutations with cumulative effects. But, remember that a Possessed with say, two Blackbloods costs 180 GC! [Games Workshop Official Mordheim's FAQ]
