This level boost package comes with two legendary item boxes, which in their turn have tracery selection boxes.

The problem is that the class tracery selection boxes contain exactly the same thing. So if you choose the box for the same trait tree both times, one box is useless because you can't have the same tracery equipped twice.

Ideally, the level boost package should give you tokens to let you choose your own traceries, since there are a lot more options than ten that come in the box. At the very least, it should warn you that the boxes contain identical traceries so that you'd know to choose a box for a different trait tree.