There will never be any duplicate puzzles in anything you purchase. However, the Puzzle Baron puzzles found in Grid Logic Puzzles do re-use the stories and an associated set of labels. So while it may appear at first glance that a puzzle has repeated, the solution is different, the clues are different and the labels usually vary.
The upside of re-using stories is the Smart Hints feature that can "understand" your board position and the associated clues.
The upside of re-using stories is the Smart Hints feature that can "understand" your board position and the associated clues.
If you'd like puzzles that always have unique stories, please try the puzzles from Penny Dell. They don't have Smart Hints, but they do have worked solutions, just like the magazines used to. You can find them here: