The time scale for a full turning of the wheel is MUCH longer than that. As the first paragraph or two of Chapter 1 of every book states, by the time an Age gets repeated even the vaguest hints of myths inspired by the last occurrence of that age are beyond the knowledge of even the most dedicated scholars. In the current age the series is set in, knowledge of the previous age is fragmentary and knowledge of the age before that is almost nonexistent (there are a few hints that it's the present day modern world). Knowledge of the 7th age, which would be 3 ages ago (less than half of a full turn of the Wheel of Time), just doesn't exist. Something like one specific mountain created by the final act of one person and named for him, along with his identity being common knowledge? That's not going to still be there in 7 ages time, but if you look on the map you'll find Dragonmount right next to Tar Valon and I doubt any adult on the entire continent west of the Spine of the World doesn't know about the Dragon, probably his name, and certainly that he'll be reborn.
And, well, part of the whole point of the Wheel of Time is that the broad outlines, and possibly a fair number of the specifics too, of history for each Age are constant - every Second Age is an Age of Legends, a time of utopian advancement that gets ended by the rediscovery of the Dark One, a war against him led by the Dragon, followed by a cataclysmic event like the Breaking of the World (possibly the same cataclysmic event; this probably isn't the first time the Dark One has tainted saidin). Every Third Age is the world dealing with the fallout for a few thousand years until the Seals on the Dark One's prison start to weaken, the Dragon gets reborn, and the leadup to Tarmon Gai'don begins.
