Most roofers employ the stack method of installing shingles verses stepping.
Many if not all manufactures warn against using the stack method, mostly for aesthetic reasons however the majority of installers make their money by the number of squares they can install…stepping takes more time but produces a better result…especially with 3 tab shingles.
Simply annotate same on your report, explain same to your customer as well as advise them as to what manufacturer recommends (if you know who the manufacturer is provide installation instructions)
Those shingles are installed using the racking method. It’s required for a few models, permissible but not preferred by others, and not allowed at all by some. The gaps are excessive.
Recommend evaluation by qualified roofing contractor.
Those are laminated/architechural shingles. I don’t believe racking is ***ever ***approved by manufacturers. They, specifically, show application method and offset on the package for best appearance and to avoid damage from over bending the heavy shingles.
On alternating courses where the right-hand shingle end was
purposely left unfastened, carefully lift the loose shingle end, so as not to cause damage by tearing or sharply bending, especially
at the top of the cutout tab “keyway,” and slip the next shingle
underneath to butt the hidden shingle end.