1. Easy if you know MySQL, but potentially confusing if you don't. In the query at around line 267, add "masterteamname" to the list of fields, add "sportsdb_masterteams" to the list of FROM tables, then add "AND sportsdb_masterteams.masterteamid = sportsdb_teams.teamid" to the WHERE clause. Repeat wherever you need to fetch a team. Then you can display the master team name in a similar way to how the team name is shown.
2. You can simply remove the portion in standings.php from "Past Scores" to "Upcoming Games" :)