under obligation,I don`t think so,we don`t know where that guy (atlasquality)popped up from,all shingles require proper installation for a valid warranty,the receptionist didn`t have a clue,no shingles are to be nailed in the tar line as that interferes with the seal,there is also a white/blue? nailing line on the shingle where it is double thick,this is where they should be nailed,oftentimes this is the difference between a good job and a bad one,if you nail higher,no mfgr will cover you against wind damage---thin cheap,loss of granules,these things I do agree with,and in those areas you should have a valid warranty claim---high nailing in the tar line,sue the contractor for reparations---you will probably notice older homes without tarlines in the same areas that don`t blow off because they were nailed correctly,which is generally about 1/4 to 1/2" above the shingle exposure---one of the big reasons to vet your contractor properly,even using quality materials doesn`t mean you will get a quality job,,,no material mfgr will warrant a poor installation that is not up to their minimum standards--good luck