Those are examples for uneccessary detailed minutiae.Star Trek has been doing that since the beginning. Very little continuity or canon is written in stone. James R Kirk, UESPA, Vulcanians, the conquest of Vulcan (by humans?), the 23rd Century setting, Data's Academy graduation date, Spot's sex and breed, the look of the Trill, the A's deck count, Saavik's appearance, the Klingon's appearance, the Romulan's appearance and the Hansen's discovery of the Borg are all changes in or from continuity. ( "Canon" just being the collected works currently accepted by TBTB)Well, people didn't like the idea of established canon being cast aside in favor of new information. My friend had a fit when the Borg made an appearance.
Exactly. Star Trek is not an encyclopedia. It's a story being made up as it goes along. And sometimes the writers change their minds when a better idea comes along.
That's just how it works.
Kirk had a son with Carol Marcus, his son was killed by Klingons, he was later accused of assassinating the Klingon chancelor, then was a key figure in the peace treaty with the Klingons. And then he time traveled 80 years into the future and died after helping Captain Picard.
Those are examples for important continuity bits.