AnnOMaly
Post 1072
Your question is easily answered and is as follows: Ezekiel was amongst those exiles taken to Babylon in 617 BCE which was the first deportation of Jews from Jerusalem to Babylon, he was commisssioned as a prophet and watchman in 613 BCE by means of a vision he experienced whilst at the bank of the river Chebar outside of Babylon.
In the twelth year after the exile (617 BCE) Ezekiel received a report from an escapee from Jerusalem a short time after the Fall of Jerusalem in 607 BCE which according to some manuscripts could have been the eleventh year rather than the twelth year. This means that at the earliest, Ezekiel received the report some time in Decmber, 607 BCE. Now having travelled some 500 miles from Jerusalem to Babylon a journey of several months this would mean that by the time Ezekiel received the news of Jerusalem Fall, the seventy years of desolation-servitude-exile had already commenced in October, 607 BCE.
scholar JW