The thing is that the different digits in those files correspond to the difference in actual age of Mitchell and Dehner.
But there is no "actual" age for either character.
Those files do list an "age" for the characters, but that doesn't seem to correspond much to the ages of the characters (in terms of looks) at the time of the episode
. Nor should they, as files of that sort ITRW never would have "age" in the sense of "birthdate". It's probably when they took the PSI exam instead...
And in that case they could be of the same age, give or take a day or ten, and Kirk is simply a few months younger (in the 1000 SD = 365 d model) or, more probably, a few months less than a decade older.
Apparently Spock's official position isn't just "Science Officer," it's "Half-Vulcan Science Officer." LOL...
Which is probably vital information when dealing with a telepathic threat.
They meant "Vernal Galaxy" to mean some entire galaxy called "Vernal"
A somewhat more probable genesis would be in general astronomical terminology. In "vernal equinox", the word indicates a direction, after a fashion: it divides the universe in two for the observer. Similarly, our galaxy could
be divided in vernal and autumnal halves for the observer, and the writer may have thought that this was
the case, or then harmlessly postulated that this would be the case, this being technobabble-with-verisimilitude just as much as "quadrotriticale" or "synchronic meter" is.