It is very difficult to determine where you yourself were hit by watching an incoming round. I've had several times a round appear to go past me or over me only to hear the hit and take damage/get killed a fraction of a second thereafter.
Lucky shots happen. I've managed to hit a Tiger on the turret ring from some 1500 yards away before and insta-poofed him. But it was just that -- luck on the hit location. A little higher and it most likely would have bounced off his mantlet, a little lower and it most likely would have bounced off his hull.
There is also something missing in your post, and it is any reference to elevation. Especially for a T-34/76 to hit you from anywhere near 2400 yards, he must have had an elevation advantage, which very well could mean a hit to your top armor, which is only about an inch thick.
Or maybe you are just a poor judge of distance. Without film, hard to say.