The asphalt composition shingles covering the roof of this home were installed with joints aligned vertically at every other course. This installation method is called 'racking.
Racking is an improper installation method for many shingle types. It is acceptable for some shingle types, and it is the required method for a few shingle types.
Recommend that the roof examined by a qualified roofing contractor to determine whether the shingles on your roof have been improperly installed.