Whenever looking at a list of games, it's possible to filter the assignments by position and then the list of games will update accordingly.
For example, if you have a game with 2 referees assigned but no timekeepers and were to look at the "unassigned games" page - if at the top you are looking for "all positions" then that game would not appear in the list because there are at least some officials assigned. But if you were to just check the Timekeeper position at the top, then the game *would* show in the list because no officials have been assigned for that particular position.
To answer your question though, the "Games With Issues" page will show games which have a mis-match in the number of officials assigned to a position compared to what the default settings are. So, if a game is supposed to have 2 referees and 2 timekeepers, and there's only 1 timekeeper assigned, then that would show in the games with issues page.
- Unassigned Games - games with nobody assigned for the position(s) selected
- Games With Issues - games with the incorrect number of people assigned for the position(s) selected
Hope that helps,