How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 8/3100.0*Average seed
Tampa Bay 0 Orlando 3 +0.3
Orlando 0 Pittsburgh 1 -0.2
Charleston 5 Richmond 2 +0.1
Los Angeles 2 Harrisburg 2 +0.0
Week of 8/10100.0*Average seed
Richmond 2 Orlando 0 -0.5
Richmond 5 Dayton 2 -0.1
Orlando 2 Seattle 0 +0.1
Week of 8/17None
Points
Chance Will Make Playoffs