Ser_Cortnay_Penrose

I have two things to bring up. I'm sorry if they are repeats I have skimmed but not scoured vol. i-v of this thread: How did Theon recognize Stannis's voice? On the first page: "He knew that voice. Stannis." When did Theon Greyjoy and Stannis Baratheon meet? Am I missing something obvious here? Is there an error?: Stannis did not reply at once. He studied the man before him, his brow furrowed. "Get up." The maester rose. "You are maester at the Dreadfort. How is it you are here with us?" "Lord Arnolf brought me to tend to his wounded." How does this make sense? If Tybald was maester at the Dreadfort, why would Arnolf Karstark have brought him? Then again: "Answer me. If we were to loose these birds, would they return to the Dreadfort?" The king leaned forward. "Or might they fly for Winterfell instead?" Why would a Karstark raven fly to the Dreadfort if the Karstarks were about to join battle against the Boltons? To send them a pre-battle greeting? Did GRRM mean to write Karhold in both instances? This part always confused me and this may be why...or I'm missing something...help?