Home Keeps Resources and Outpost are worth X2 points. So it is worth 2 points to hold your own stuff, but only 1 point to hold the enemies. Scrolls score the same way but are worth 20 points to have your own and 10 points to hold the enemy scroll.
That's why if you see that the other alliance has the same number of Keeps (etc) but the score is different, it's because of the number of home stuff held compared to enemy stuff held.