628 BCE is not only 628 but it is also 624 BCE?
You say Jeremiah was commissioned CIRCA 647 BCE
The 4th year of Jehoiakim was 23 years after the 13 year of Josiah - so why do you say CIRCA for Jeremiah but give exact dates for Jehoiakim and Josiah?
Look at it closely
It is unclear where 628 B.C.E is
Something like this would have been clearer
It highlights that you are dealing with a range of years and not suggesting 628 BCE is 624 BCE.