Well . . .
Do they all have the same hose length?
Are the all on the same pressure? Are you 100% sure, meaning you didn't over carbonate it by force carbonating at 30 psi and are now pushing at the same pressure as the other two?
Assuming the answers are yes, there is probably some restriction in the line causing the problem. Look at the line itself, is the beer foamy right out of the keg? If so, check the poppet. Does it start to foam on the way to the faucet, or only when it's coming out? Debris in the faucet or the line can cause foaming, as can a kink in the line.