FT: So they have erased their doctrine about 1919?
No. But you clearly have trouble understanding English, not that this week's Watchtower is exactly a model of clarity of thought or precision of language. The prose is (I believe) deliberately abstruse.
Twisted, tweaking, vacillating and equivocating obfuscation is not an erasure. It is at best a sign of muddled thinking by lazy, untrained and/or undisciplined minds not up to the task of trying to explicate scripture. At worst, it is evidence of skilled manipulators yanking the chain of their blindly obedient cult members. Misdirection is the stock in trade of sleight of hand magicians and their rhetorical counterparts: snake-oil con-men.
The difference is that the former practice their arts for entertainment, while the latter utter prosaic nonsense for the purpose of manipulating and defrauding the gullible and the naive for their own enrichment. One is a fun diversion, the other is criminal.
No matter how you slice or dice it: It's a cult!