Some people will spread (and believe) theories like that (apostates infiltrated the org and disseminated false info). I never heard that particular one. Where I was, we felt that the info was from the GB and that it was always good. If someone pointed out that older literature had different ideas, I would explain that the GB had received new light since then and updated our understanding, or something similar to that.
The concept of "new light" can paper over a vast amount of bad information and mistaken ideas. It can be used -counterintuitively- to promote the claim that they have God's blessing, by explaining that the older and mistaken belief was the "right one at the right time" and that the new understanding had arrived just when it was needed most.