How to create a cut list for dimensional lumber

I have a project, and am trying to understand how to create a cutlist.

Example: I have several pieces that are varying widths and lenghts that can all fit on a single (or multiple) boards that are roughly 1" X 5.5" X 8'

It doesn't appear to group the varying widths together, even though they would fit on the same board.

I tried doing it as a sheet good instead of dimensional, but that didn't seem to work either.

Suggestions?