I've noticed this about the Book of Isaiah. A person needs to get used to the sweeping time shifts that occur. Not just between chapters within the book, but even between statements within the same chapter. I believe this is intentional. God is laying out a story board of what he will ultimately accomplish - the big picture. He does address the immediate, but then points the reader to the ultimate.

This is evident in the Messianic prophecies:

"Therefore the Lord Himself will give you a sign: Behold, the virgin will be with child and will give birth to a son, and will call Him Immanuel [God with us]".

or

"For unto us a child is born, unto us a son is given, and the government will be upon His shoulders." 

And then only a few verses later begins describing the establishment of His Kingdom on Earth or His executing judgment on "The Day of the Lord".

Based solely on Isaiah, it would be hard to fault the disciples of Jesus for their expectation that Jesus would establish His Kingdom at that time!

You can also see these wide time shifts when Isaiah is describing Israel's historical national judgments:

"This is the burden against Babylon that Isaiah son of Amoz received."

He goes on to describe the destruction of Israel at the hands of Babylon, and then immediately shifts again to "The Day of the Lord". In fact, you could probably change the tense from future to present for portions of Isaiah and insert it directly into the parallel passages in the Revelation to John and not skip a beat. 

Note to self: These time shifts are not meant to confuse. I believe they are there to remind us of the big picture.