CertainTeed, building materials manufacturer of Insulation, Roofing, Vinyl Siding, Fiber Cement Siding, Vinyl Windows, Composite Decking, Vinyl Fence, Vinyl Railing, PVC Pipe
They have two great manuals both at my favorite price--$0
The Shingle applicator's Manual 8th Ed. and the Shingle Technology Manual 7th ed.
I ditto Mr. Peck's CSI conclusions. Regardless of the condition of the shingles, a properly trained and supervised installer should know what to look for and stop when things are not kosher. The mfr. should do more to train suppliers and installers in proper handling including the sequelae for mis-handling.
These shingles are improperly nailed. That right nail is way too high. Largest single cause for tear-off failures.