Im gonna have to disagree about the gluing. Ive tryed that once or twice in the 136 rentals i maintenance. 90% of the time it comes down to someone not following the manufacture specifications which 99% of the time is listed on the box. When he decribed the curling he didnt alow the time to adjust to the house. Both the Underlayment and the flooring. Or there is a possiblity he went short ways with the underlayment witch would also give you the effect of curling.
But without a Picture of what it looks like its really hard to say. Its like that old lady that calls andleaves a message saying her bathroom nob doesnt work.
to each there own