So what your saying is that height, tap, and line resistance you still have about 3 psi from the keg pressure?
So for me.
8 ft at 1psi/ft = 8psi of line resistance
Tap resistance = 2 psi
2 ft of height at 0.5 psi/ft = 1 psi of height resistance.
Adding together that gives me 11 psi to balance...