Debounce not working on projectiles, to an extent?

So, I'm making a projectile-based PVP game, and I recently found out i was a bit 'special' creating moving parts on the server, so I'm having moving parts replicate to all clients. Everything works, apart from the debounce, which allows each thing to be hit two times exactly before stopping itself, and I can't figure out why.

Here's the code:

---- DAMAGE FUNCTION ----
local dmgevent = game.ReplicatedStorage:WaitForChild("DamageEvent")
function Damage(Caster, set, Victim, dmg, Part, SpellName)--(function(Player, set, Victim, Damage, Part, SpellName)
    if Caster.Name ~= Victim.Name then
        dmgevent:FireServer(set, Victim, dmg, Part, SpellName)
    end
end
-- THE EVENT --
dmgevent.Name = "DamageEvent"
dmgevent.OnServerEvent:Connect(function(Player, set, Victim, Damage, Part, SpellName)
    MarkInfo(set, SpellName, Damage, script.BlankSpace, Part)
    bb(Victim.Head.CFrame, "-" .. Damage, Victim, function(item, dura) game.Debris:AddItem(item, dura) end)
    Mark(Player, function(item, dur) game.Debris:AddItem(item, dur) end, Victim.Humanoid)
    Victim.Humanoid:TakeDamage(Damage)
    print("Damaged" .. Victim.Name)
end)
--- ONTOUCH EVENT ----
local Done = {}
        local function Already(obj)
            for _, don in ipairs(Done) do
                if don == obj then return true end
            end

            return false
        end
        b.Touched:Connect(function(Hit)
            if Hit.Parent:FindFirstChild("Humanoid") and Hit.Parent.Name ~= Player.Name then
                wait(.1) -- because its way too quick
                if Already(Hit.Parent.Name) == true then return end
                table.insert(Done, Hit.Parent.Name)
                print("Put " .. Hit.Parent.Name .. " in 'Done' table")
                Damage(Player, set, Hit.Parent, dmg, b, "BlastBullets")
                if math.random(1, 3) == 2 then Hit.Parent.Humanoid.Sit = true end 
            end
        end)

b is the Projectile, and the only time Humanoid:TakeDamage is called in all of those functions is in the event (Victim.Humanoid:TakeDamage()). Everything does damage exactly two times, and I can't figure out how, so help would be appreciated! Thanks in advance.