Not at all. There is no way that the fifty years can fit into the context of seventy years. Scholars of Josephus have opined that the original reading was seventy rather fifty and this would harmonize with the seventy years not fifty years mentioned in the previous paragraph 19 of chapter One. In addition there is no chronological construct applicable for a fifty years but of course there is for the seventy year period. In short, the fifty year period is a nothing period.
The fifty years ran from 587 to 537, from when the temple was destroyed to when it started to be rebuilt. It fits very logically with the facts. The Society's suggestion that the exile started in 607 is readily disproved from the bible. Isaiah 45:1, Jeremiah 25:11-12, Daniel 5:26-31 and Jeremiah 52:28,29 all invalidate the Society's model before even approaching the secular evidence.
What you fail to realize that any chronology is constructed on the basis of methodology and interpretation and chronologies differ because of different methods and views. In other words, chronologies are deductive in nature, our chronology is event based whereas the populist are regnal based thus arriving at different conclusions.
The Society's chronology is not event-based, it is dogma-based. It must provide a result of 1914, and so it twists the scriptures to achieve its goal. That is why no-one else agrees with it, because real scholars prefer facts to dogma, and no matter whether they rely on contemporary Babylonian chronology or Egyptian chronology, Ptolemy, Josephus, or any other source, they all end up twenty years different to the Society's incorrect interpretation.
Celebrated Wt scholars adjusted their chronology with new and latest research and so have other scholars operating on similar lines. The book of Daniel is prophetic in outlook with a basis in history and this leads to much larger fulfillments of prophecy. Indeed, Daniel as a book was to be sealed up until the time of the end so it is no surprise that Daniel is about eschatology including the Gentile Times. It appears that you do not like Daniel and you have littel interest in its contents.
The only adjustment the Society has made to its chronology was when they realised there was no year 0. You errorneously conclude from Daniel 12:9 that it is the entire book of Daniel that was "sealed", again with no valid basis. The "Gentile Times", as has been explained previously cannot have started prior to 70AD because of the use of the Greek word 'esomai' in the original text at Luke 21:24.