Why is this code running for all players instead of just the player that chatted?

Help and Feedback Scripting Support
#1

Code that runs on the client in every player.

wait(.1)
local thing = script.Parent.Parent.ChatFrame.ChatRenderFrame
local name
local msg
function trim(s)
	return (s:gsub("^%s*(.-)%s*$", "%1"))
end
--print(script.Parent.RemoteEvent.Name)
thing.ChildAdded:Connect(function(child)
	if string.find(child.Name, "message") then
		wait(0.1)
		local split = string.split(child.Name," - ")
		name = thing:FindFirstChild(split[1])
		msg = child.Text
		local box = child:Clone() --anything from here to senderp you can delete
		box.Parent = child
		box.Position = UDim2.new(-0.01,0,0,0)
		box.Text = name.Text..trim(msg)
		box.TextXAlignment = Enum.TextXAlignment.Left
		box.TextYAlignment = Enum.TextYAlignment.Top
		box.Size = UDim2.new(0,box.TextBounds.X + 24,0,box.TextBounds.Y + 1)
		box.Name = name.Text..trim(msg)
		box.TextTransparency = 1
		box.ZIndex = -1
		box.BackgroundTransparency = 0.3
		print(thing:FindFirstChild(split[1]))
		local senderp = game.Players:FindFirstChild(game.Players.LocalPlayer.Name) -- you can remove everything above this if its not 2012
		print(senderp)
		if senderp then
			print("SENDERP")
			if senderp.Character then
				if senderp.Character:FindFirstChild("Head") then
					
					local texttosend = string.split(name.Text..trim(msg),";")
					print(senderp,texttosend[2])
					wait(0)
					game.ReplicatedStorage.OB_Events.OB_ChatBubble:FireServer(senderp,texttosend[2])
				end
			end
		end
	end
end)

Code on the server.

wait(.1)
local thing = script.Parent.Parent.ChatFrame.ChatRenderFrame
local name
local msg
function trim(s)
	return (s:gsub("^%s*(.-)%s*$", "%1"))
end
--print(script.Parent.RemoteEvent.Name)
thing.ChildAdded:Connect(function(child)
	if string.find(child.Name, "message") then
		wait(0.1)
		local split = string.split(child.Name," - ")
		name = thing:FindFirstChild(split[1])
		msg = child.Text
		local box = child:Clone() --anything from here to senderp you can delete
		box.Parent = child
		box.Position = UDim2.new(-0.01,0,0,0)
		box.Text = name.Text..trim(msg)
		box.TextXAlignment = Enum.TextXAlignment.Left
		box.TextYAlignment = Enum.TextYAlignment.Top
		box.Size = UDim2.new(0,box.TextBounds.X + 24,0,box.TextBounds.Y + 1)
		box.Name = name.Text..trim(msg)
		box.TextTransparency = 1
		box.ZIndex = -1
		box.BackgroundTransparency = 0.3
		print(thing:FindFirstChild(split[1]))
		local senderp = game.Players:FindFirstChild(game.Players.LocalPlayer.Name) -- you can remove everything above this if its not 2012
		print(senderp)
		if senderp then
			print("SENDERP")
			if senderp.Character then
				if senderp.Character:FindFirstChild("Head") then
					
					local texttosend = string.split(name.Text..trim(msg),";")
					print(senderp,texttosend[2])
					wait(0)
					game.ReplicatedStorage.OB_Events.OB_ChatBubble:FireServer(senderp,texttosend[2])
				end
			end
		end
	end
end)
#2

You know you can just use wait() or task.wait() which will make the cooldown be set as 1 frame by default (0.3 for wait, 0.15 for task.wait)