The footnote at the bottom of the page of the second link you listed makes it clear that this is not a website set up directly by the WTS.
One of our advisers sent this note: ‘I would remove the argument about the timing of Daniel's exile, 3 years of training and then interpreting a dream in the second year of Nebuchadnezzar. Those who make this argument are not taking into consideration the calculation of regnal years/ascension years for Babylonian kings. By the facts, this is entirely possible, hence it is not an argument against secular history's timeline.’
The WTS would never admit to having "advisers." This is likely a site set up by an individual JW who is using the evil internet in a non GB approved manner.