Need help making sense of alignment numbers and caster!

[oscaroc]

I have a 1988 V30 crewcab dually that I recently installed a 4" lift. The problem I'm trying to correct is a very wandering steering feeling, herding chickens feel. Driver input to vehicle response is very delayed and usually needs correcting. The question I have, If you look at the caster numbers, I have 5.5 & 6.6...would this be total caster? Or is that 5.5 & 6.6 in addition to what the factory specs should be? Are the arrows supposed to be in the green or is the green area zeroed?