[Jennifer Liang]

In TGS, Sulin appears as one of the Maidens with Rand in Bandar Eban. But in the last book she was with Perrin. No mention of Traveling or communication between the two groups is made. What gives?

Intially, when TGS was released, Brandon insisted that Sulin was right where she was meant to be. After the Atlanta booksigning when I mentioned his "mistake", he said "Don't assume that Sulin is a mistake." Which was consistent with his other statements at previous signings.

However, a few months later scattered reports of Brandon going back on that were posted on the Dragonmount forums. I took an opportunity to clarify the situation with Brandon when I saw him at Minicon in April, 2010.  The gist of the conversation is that Sulin was supposed to be with Perrin's group all along. Due to the overlapping timelines of TGS and the forthcoming Towers of Midnight, he thought Sulin would've been able to join the other group. After consultation with Maria Simons, one of the two continuity editors for the series, Brandon realized the mistake and future editions of TGS will be edited to correct Sulin's location.

Brandon posted further confirmation on his Twitter recently:

Rob Trotter on Twitter - 1 August 8:32 am
Any chance you could clear up Sulin in The Gathering Storm? Was her appearance a typo or deliberate (Varied answers exist on the web?)
Brandon - 9:37 pm
Sure, you guys deserve an answer on this one.
9:37 pm
Sulin began life as a simple typo. When I saw it, I shrugged, and had a good reason. Maria thought that reason would not work.
9:38 pm
So we decided to retcon it out. Mistake was mine all along. Really nothing special to report there, I'm afraid.