American politics

Ok guys, I got a serious question about the American politics here.
It's about the fact that even if one party would get 49,9% of all the votes in a state, the party with more votes will be given 100% of the votes after counting...(in the case of just 2 parties, otherwise the parties would have a bit less %'s but still the same principle).
Ok so let's say now that party A gets 100% of all the votes in 24 states and just 49,9% of all the votes in the remaining 26 states. Resulting in a win in 26 states for party B. This would result in party B winning right?
So wouldn't this make the entire system totally unfair? I know that this is practically almost impossible, but still there is a small chance...

That's exactly how it works, and in fact your example isn't too far off. Plenty of presidents have been elected even when their opponent got far more votes. Politicians routinely fuck with the voting district lines to ensure that projections show their party getting 55% of the votes in most areas while their opponents get 90% of the votes in a small number of areas.