I don't get it...
Fe - decisions based on external (interpersonal) values
Fi - decisions based on internal values
Ti - decisions based on internal logic
Te - decisions based on external logic
An example of Te vs. Ti...
Ti - A theoretical physicist uses a complex set of equations and logic to solve a problem.
Te - An experimental physicist performs an experiment and draws conclusions based on data.
So then why in the world is Te described as being extremely organized and planning everything? I suppose I can in some way see how Te could manifest that way, but it's a horrendous generalization. Generalizations are somewhat necessary in MBTI, but they're useless if done incorrectly.
The modern "cognitive functions" are, to a significant degree, a set of descriptions jerry-rigged to match up with the MBTI types who supposedly "use" them as one of their top two.
That means having "Te" descriptions match up with TJs — and TJs are J's, and decades of data (MBTI and Big Five both) have established that there's a real, substantially genetic personality dimension involved, and that the folks who have what the MBTI calls a "J preference" have a tendency to favor planning and organization. (But note that "neatness" is more of an SJ thing, and there really aren't any official MBTI test items that ask about neatness and messiness.)
But it's not like Jung had failed to notice that one of the more substantial two-kinds-of-people things that divided his types from one another was the difference between what he called the "rational" types and the "irrational" types. Jung said that irrational types "find fulfilment in ... the flux of events" and are "attuned to the absolutely contingent," while rational types seek to "coerce the untidiness and fortuitousness of life into a definite pattern." He said a rational type tends to view an irrational type as "a hodge-podge of accidentals," while an irrational type "ripostes with an equally contemptuous opinion of his opposite number: he sees him as something only half alive, whose sole aim is to fasten the fetters of reason on everything living and strangle it with judgments."
As part of the (perhaps intentional) misinterpretation of Jung (discussed
here) that led Myers to declare that the auxiliary would have the opposite attitude to the dom, Myers also said that
introverted J's were "irrational" types (i.e., P-doms), but that complication is really beside the point for purposes of this discussion as long as you buy into the idea that, when Jung was looking at people he thought were rational types (i.e., J-doms), he was looking at the people who'd test "J" on the MBTI.
In any case, if you look at Jung's portrait of Te-doms, it certainly reflects the drive toward "strangling life with judgments" and "coercing life into definite patterns" that Jung associated with his "rational types" (J-doms) generally. So that aspect of modern Te descriptions, besides fitting MBTI TJs reasonably well, is also consistent with Jung's original conception of Te.