You're right, but the main Scroll told of every event that would happen throughout every era, or did it only tell of the 3rd era?
There is no "Main Scroll." Each scroll contains a single prophecy, the rise of Jagar Tharn, the Numidium, The Nerevarine, the Oblivion Crisis, et cetera. The specifics of these prophecies, if memory serves correctly, varies between anyone who reads each scroll. For instance, say three people read the Elder Scroll regarding the Nerevarine Prophecy. One will say that the Nerevarine was a Dunmer, another will say the Nerevarine was an Imperial, a third will say that the Nerevarine is a She and is a Nord. Once the prophecy is fufilled, the Elder Scroll switches it's contents to match the specifics of the prophecy.
The majority of the Elder Scrolls series only takes place in the 3rd Era, there is no real specific reasoning for this, it just is.
As for the GI article, it never said that those were the only events that would happen, did it?