1) Everyone can here the dwarf's yells. He's a dwarf after all and can be extremely and obnoxiously loud when he wants to be.

No effects are affecting the sound.
2) Virif was the only one in a position to notice the fleeing couple other than the merchant. Kyara was off ahead of the group and the other two were worrying about the brigands to the south of the caravan (the couple ran north). The merchant was worried about not dying when faced with a skilled swordsman.
3) I do fully understand the racial abilities of the characters, and hopefully you can trust me to account for them (though I admit I'm not perfect so I don't take offense to the occasional reminder). In the case of Virif, I have taken that into account with the description I sent him.
4) I will try to do any knowledge skill rolls and such as the party encounters things, but if you want more specifics or want to apply a specific knowledge skill to a specific thing, event or situation please let me know in the out of character text. This applies to Spellcraft checks as well.
5) The guards that were at the rear wagon of completely gone. If you want to more thoroughly investigate that spot for any furhter clues or signs, please do so. The wagon itself is still present, with the splinters of the broken wheel still attached to the rear axle.
6) The brigand that got splashed in the face with acid was in negative hit points after the attack. Thus his cries silenced. As of the current post he may or may not be dead as far as the characters know. Regardless his cries of ceased.
Thanks and hopefully you guys are enjoying this thus far.