There is no need to inform the Writing Committee of an error as none exists for what was stated in the Isaiah book is totally correct. The only error is on your part in your lack of comprehension.
No, you are quite wrong. I have very good reading comprehension, though only average reading comprehension is required to understand what is stated in the Isaiah book: that the 70 years for Tyre ended in 539, and that those 70 years were those referred to in Jeremiah 25:12. In fact, from what is stated in that publication, there is no other way to interpret it. The paragraph in question states:
*** ip-1 chap. 19 pp. 253-254 Jehovah Profanes the Pride of Tyre ***"These nations will have to serve the king of Babylon seventy years." (Jeremiah 25:8-17, 22, 27) True, the island-city of Tyre is not subject to Babylon for a full 70 years, since the Babylonian Empire falls in 539 B.C.E. Evidently, the 70 years represents the period of Babylonia’s greatest domination—when the Babylonian royal dynasty boasts of having lifted its throne even above "the stars of God." (Isaiah 14:13) Different nations come under that domination at different times. But at the end of 70 years, that domination will crumble. What will then happen to Tyre?
Obviously "the period of Babylonia's greatest domination" could not at all extend beyond 539. To clinch exactly when that the publication is suggesting the 70 years for Tyre ended (which it has already equated with the 70 years of Jeremiah 25:12), the book continues:
"Following the fall of Babylon in 539 B.C.E, Phoenicia becomes a satrapy of the Medo-Persian Empire. The Persian monarch, Cyrus the Great, is a tolerant ruler. Under this new rulership, Tyre will resume her former activity and try hard to regain recognition as a world commercial center"
There is absolutely no reference to the 70 years ending in 537, and no suggestion that there was a two year break before Tyre was no longer dominated.
But there'll probably be a reprint of the book with the text changed once they realise they've contradicted themselves, just like they've done with other publications.