I had a double garage built 2yrs ago the rear and side walls are single leaf with the front being double. In each rear corner is a brick pillar tied into rear and side walls with metal wall tiles, in the centre of each side and the rear walls are single brick pillars two brick width, these are tied again with same wall tiles but the mortar has cracked from top to bottom where they meet the outside wall and if I push them I can hear them knock against the outside wall? They don't sway or swing but they definitely have a small amount of movement, this doesn't seem right?