I posted several pictures a while back on a tile roof for a 1 year warranty inspection that had exposed nails. The head lap joint did not properly cover them. My inspection was verified by an independent roofer.
This is a photo of their repair. After looking closer at this gable style roof I decided to count the rows of tile. One side has 11 rows and the other side has 12. After finding that I went to two homes that are the same model. They all have 12 rows on each side.
My opinion is that the tile need to be removed on that side of the garage and reinstalled with the proper overlap. Am I too picky? How long do you think their repair will last?