I believe the TBA
reference is from page 336, which recounts the events of "Time's Arrow," and then says, "Eventually the anthropologists had returned for her, and she had begun the long migration home, sobered by her brush with death."
So it seems to me that, if someone really wanted to reconcile TBA
, they could just reason "eventually" was a hundred years later... a blink of the eye for an El-Aurian.
... or, what Spike said.