Extra time

So how come when it’s the first half there’s no extra time and as soon as I get to scoring they call it half time and also at the end they give a whole extra two minutes after they just said 1 minute of extra time and they give the other team a chance to score after they lose the ball multiple times and they get it at the end and score to tie the game at the last minute fix your game please it’s just coding it’s not that hard.