repairing brickwall

huhu,
for some reason one tile of my brickwall has taken huge damage (down to 19%) - it is claimed with both p-and v-claim... so i tried to repair it... so far i put 50 bricks in and it only got to 25%... seems pretty silly. i has been a while since i had to repair a brickwall but i remember it as 1 brick per 1%... is this a bug?
ty keigh
for some reason one tile of my brickwall has taken huge damage (down to 19%) - it is claimed with both p-and v-claim... so i tried to repair it... so far i put 50 bricks in and it only got to 25%... seems pretty silly. i has been a while since i had to repair a brickwall but i remember it as 1 brick per 1%... is this a bug?
ty keigh