I had this house that I inspected last weekend that had these steel plate shims on top of every pier, except for one. It looks as though whoever did the block work had every Pier set about 3/8" to 1/2" to low. Is this standard practice in construction, because I’ve never seen it before until now where it was on every Pier. There was one Pier with nothing on it and had a gap above to the girder. Any thoughts appreciated.