Well, first off, what does "1000 years more advanced than it was supposed to be" mean?
Supposed to be according to whom?
What is more advanced?
And no, evolution doesn't imply that a species will never change unless some die off. It states that those that are more well-adapted to surviving in the current environment will indeed survive better, and will produce more offspring. That could just as well lead to a new or seperate species from the less-well-adapted ones as it could the ones better adapted to completely take over.
With regard to humans getting smarter, if indeed being smarter does give an advantage to survival, then more smart people will live longer and produce more offspring. It's possible the not-as-smart ones will die out, but it's not necessary.
When I look at, say, the current president of the US, I'm not sure being smart right now has an evolutionary advantage ;-) In the long run it probably will be an advantage for humans to be smart, and the not-so-smart ones won't survive and will die out -- but that could take hundreds of thousands of years.
Finally, that somebody in ancient Greece came up with a cool calculator doesn't make him "smarter" than anybody living today. It means he had a good idea and was able to execute it. But he also probably believed in the Greek gods, didn't know anything about what caused diseases, didn't know anything about space or even the planets in our solar system, etc. Overall, despite hanging on to superstitious ancient myths aboug god-beings, people today are smarter than humans have ever been. This guy was obviously good in math, and may have been ahead of his time...that doesn't make him smarter than people today.