Bullets are creating explosions twice when hitting multiple parts?

I'm pretty confused on the workaround for this. My gun's bullets, when hitting multiple parts, runs the touched event twice before the bullet is destroyed.

    missile.Touched:connect(function(hit)
        if hit.CanCollide ~= false or hit.Name == "Right Leg" or hit.Name == "Left Leg" or hit.Name == "Left Arm" or hit.Name == "Right Arm" then
            if hit.Transparency ~= 1 then -- The above could lag?
                missile.Parent = nil -- Still creates the explosion
                local E = Instance.new("Explosion")
                E.BlastPressure = S.ExplosionPressure
                E.BlastRadius = S.ExplosionRadius
                E.DestroyJointRadiusPercent = (S.RangeBasedDamage and 0 or 1)
                E.ExplosionType = S.ExplosionType
                E.Position = missile.Position -- It creates two explosions!!!!
                E.Parent = game.Workspace
                E.Hit:connect(function(hitPart, partDistance)
                    if (not hitPart:IsDescendantOf(Character)) and hitPart.Name == "Torso" then
                        print("Hit "..hitPart.Name.."!")
                        local humanoid =  hitPart.Parent:FindFirstChild("Humanoid")
                        if humanoid then
                            local distance_factor = partDistance / E.BlastRadius  
                            local distinvert = 1 - distance_factor
                            local newdamage = damage*distinvert 
                            humanoid:TakeDamage(newdamage) 
                        end
                    end
                end)

                --HitSound:Play()

            end
        end
    end)

So, due to this, it creates two explosions, thus harming any humanoids nearby twice. How would I prevent this from happening?