Polegnyn Nemeara
Aes Sedai
It was a matter of one plot-line being ahead of another in writing, not in time. Sanderson cut off at Rand's Dragonmount experience. In a way, Sanderson was juggling the many open plot lines, especially the main ones, and trying to close them and bring them together for the last book. And even that wasn't complete; since the resolution of the Black Tower was supposed to happen before the last book, if I remember correctly.
That's what I suggested to the person, but apparently it's not an acceptable solution because they are picking out other timeline inconsistencies. lol oh well. This is another reason why I try not to look too closely at fictional writing, especially so when it comes to fantasy