Since when? This newfangled Electoral College System is only about 200 years old.
Why do you suppose it is "supposed to be one person one vote"? Where does that notion come from? The people who invented modern democracy were the same people who thought this was the best possible system. It isn't a modern contraption that goes against the nature of modern democracy.
It IS one person, one vote. Bascially, you are voting not for Gore or Bush, but conducting a state election (or district in a few states) to determine which slate of electors your state will send to the Electoral College (which is almost as popular as the College of Cardinals, but more of a "party college".)
Then each state, in proportion to its population, casts its votes for one single person. It is the ultimate form of representative democracy in a Republic form of government (remember, we are a collection of states with a centralized federal government).
It is the same thing, as I said earlier, where the Senate provides two votes for each state even though there are fewer people in the state of Montana than in the city of Chicago.
It is a representative democracy that works much better than any system of government in the history of mankind.
It is also not the first time someone has won the popular but failed to gather the electoral votes needed to get the top job.
So while the farmers of Nebraska don't know what the city folk of Los Angles need (and vice versa), by this integrated system the needs of the whole country are adequately represented. It is win-win.
Best possible system.