How did my fantasy basketball team only finish in 5th place in my league?

I thought I had a pretty awsome team as the season went on, and I always kept it updated as far as who was in the line up.

Here was my team:

Tony Parker (PG)

Rajon Rondo (PG/SG)

Joe Johnson (PG/SG)

Richard Hamilton (SG)

John Salmons (SG/SF)

Mike Dunleavy (SG/SF)

Rudy Gay (SG/SF)

Richard Jefferson (SF)

Tayshaun Prince (SF)

Hakim Warrick (SF/PF)

Carl Landry (SF/PF)

Luis Scola (SF/PF/C)

Tim Duncan (PF/C)

Chris Bosh (PF/C)

Jermaine O'Neal (PF/C)

Tyson Chandler (C)

I guess my problem was a combination of injuries, and having too many players on common teams.....

What do you think?