Sounds to me like your beer may be over-carbed and your serving pressure too high. IMO, two seconds to pour a pint is way too fast.
I wouldn't say it's overcarbed. It was force carbed for about 4 minutes, gently rocking the beer on it's side at 20 PSI, vented and stabalized to 12psi at 38F. I hooked up some seltzer with 10' of new line on the other tap and it has much more reasonable pour.