I had this happen to me once before. Sometimes it seems that the task doesn't recognize the changes you have made. Could you try it again, but make sure that it has finished 'spinning' after the last change before you hit 'Run'. If it doesn't 'spin' after your last edit (like it should do after all edits) you might need to click in the white space of the task window (anywhere outside the domain table) to make it commit that last change, then click 'Run'.
If that doesn't fix it - maybe double-check that your map contains the same layer you are updating? We've all done this
If that all looks good and you still aren't seeing the changes, let me know!