If a user opens a category or folder in the i2b2 web client that contains at least one modifier and more elements than the maximum number of elements to display, this modifier will appear as many times as the user is prompted with that display. This error can be averted by manually setting the maximum number of child folders to display before opening a folder.

If the user is prompted to increase the amount of items to appear n times, the modifiers will repeat n+1 times. In the attached picture, I was prompted to increase the number of child folders to display 3 times, and there are 4 copies of the modifier present.