I suspect you mistook what I meant. You thought I spoke of the timeline jumping with Tam, right? I wasn't. I was speaking of characterization.
Nossy got what I was referring to with Uno. He was a Shienaran officer, second in command to Lord Ingtar. When he reached Salidar, Bryne spotted that and immediately made him an officer of his army, and asked him to train an heavy cavalry. He had Bryne's trust, it's Uno he placed in command of the Amyrlin's escort when she went to meet the noblemen in TPOD.
Another mistake is that Shienarans won't balk at taking the lead. Their tradition is that the complete chain is known by all, so that there's no question who will take command in battle should the officers fall in battle, all the way down to the last recruit.
Brandon forgot that, so his whole Uno arc in AMOL is based on misrepresenting Uno as common soldier and one Bryne wouldn't have thought was officer material. Starting with this continuity error, it could only run into a wall.
It's a very similar mistake with Tam. His reluctance to lead Perrin's armies and that Perrin's commanders might not follow him willingly was a continuity error.
In KOD, Perrin fetched Tam and made him the commander of all his forces. Arganda had initially balked at Perrin naming a First Captain to command them (he was expecting some TR farmer with no experience, I would guess), but then Tam entered the tent and Perrin gave them his name, which they recognized (obviously Tam has some sort of reputation from having been second in command of the elite Illianer Companions, veteran in the WC wars and Aiel war, in which Arganda fought, and perhaps for being a blademaster, and perhaps for bearing the same name as Rand...). Tam is unflappable, as usual not one bit impressed by the nobles. He merely comments curtly the battle plans look fine. Arganda then tells Perrin "If that's your First Captain, I have no more objections", which gives a measure of Tam's reputation. Perrin thinks wryly that Arganda had plenty of objections to offer before knowing his First Captain was Tam al'Thor.
In AMOL, Perrin as he leaves makes Tam his commander all over again, when he already held that position and the title of First Captain since KOD, and when Tam acting out of character balks and fears the other won't follow him (when they had previously been quite happy to do so), Perrin made him a lord.
Brandon did some good things with Tam, but this whole thing about leadership and giving him a title of nobility (which only Elayne most likely could give anyway), a kind of replay of what happened to Perrin and was "cute" but broke with his character and the continuity.