I honestly believe the reason that this happens is because of the individuals they use to write these magazines. these are not college educated men.
Lack of adequate training may contribute to misrepresentations found in Watchtower publications but the root cause is, in my opinion, a groping for justification. Take for example Watchtower's misuse of statements made by Bartholomeo Santinelli. The document quoted from is in Latin, so someone inside Watchtower had to have had training sufficient to translate Latin into English and then cherry-pick words from what Santinelli said. It is impossible to have selectively picked what Watchtower writers did of Santinelli's position without realizing it amounted to a wholesale lie. It took training to do what those writers did.