Very common. Thats why its bad for drill sheets to be available to general bowlers. If the ball isn't drilled identical to the pic it must be wrong. Then the person will refuse to listen to reason other wise. If the driller drills the exact layout 45 x 4.5 x 70 it will likely look different for each bowler based on their pap. Just look at three examples of the same layout for the high, medium, and low track bowler. Same layout based off the bowlers unique release and some would argue the layout is not the same based on look and not their release.
In reference to the other shop saying they would have drilled it differently keep in mind everyone has a different opinion on layouts for hook, length, less hook ect. Many times they are opinions not facts.