There's just something about him that doesn't seem to click. He's a little too convenient for Perrin, especially the way he showed up again, just at the right time. He never helps Perrin with the wolves any more and didn't even mention Dumai's Wells, probably the most important event for the wolves for centuries. He doesn't seem to care what Perrin's got planned for them either, they've been his only friends for years, why doesn't he care more? Also, he killed two Warders when he was escaping, why didn't their Aes Sedai demand he be hunted down? We know his Aes Sedai could have found him.