In defense of NP, he did kind of predict 911.He said that it would start with something to the measure of 9/11 and then from there, separate incidents would occur from then on. I think that he must have privied into this timeline and had been places that he was not supposed to have gone.
What one of the more astute posters had come up with, is that Titor, like a monkey on a tree, was using branch timelines, to locate in and out of other timelines. This was shown by a time traveler on YouTube, as a technique to laterally get to precise areas of any timeline.
The reader here, however must realize that his time displacement unit, was not a top of the line machine. It was at best, an Edsel of a TT jumper and proably not radiation protected at that. What is occurring now, actually for quite a while now, is that the more inventive HDR users, are finding alternate ways to enact the abilities of their HRDs.
This is by adding Tesla coils to autos and such, in order to take the entire vehicle along...I've read where Titor went rouge, because of involvement with someone and became a wanted criminal by his own cadre, within his particular timeline. If you go to the people who supposedly jumped in time during the Philadelphia Experiment, some of them had become extremely radiation worn.