There's actually 6 factions that get played out - two of the factions are based on our Protected Ground.  One of those gets a +2, the other gets a -2.  The second pair of factions are related to one the Upgrades we took initially - one of those gets a +1, the other gets a -2, but we can spend Coin to change those values.  The third and final pair of factions are related to the Crew Contact we take.  We get a +1 with one faction, and a -1 from the other.