Umm. Either you just don't get it, or your using a varient on the initiative rules.
You roll initiative once. Then after that, everyone maintains that initiative.
Which means - there is no first after initial attacks. Either they got to hit first, or you got to hit first and then it's just on to general melee. If the fight is ongoing, then whether those bad guys initiative is 3 or 53, they still get one go per round.
If you took improved initiative, then MAYBE you got an extra attack in during the first round. If you were lucky.
If you had combat reflexes, then maybe you got an attack (or two or more - if you had a +1 dex or better) as they closed in.
Given that ranged attackers won't usually be in a position to allow a countercharge, I personally put more stock in combat reflexes.