Help with FilteringEnabled/Chat gui?

Hello guys I'm back, this time with a slightly longer question, I am trying to make a filtering enabled chat gui but am having an issue. The message is meant to be made locally, then through a remote-event is cloned onto everyone's client other than the senders, here is the code:

Local code: (creates gui for the sender, successfully moves all other messages up one)

player.Chatted:connect(function(message)
    local PG  = player:WaitForChild("PlayerGui")
    repeat wait() until PG:FindFirstChild("chatter")
    repeat wait() until PG.chatter:FindFirstChild("textboxy")
    local Parent = player:WaitForChild("PlayerGui").chatter.textboxy
    for i,v in pairs(Parent:GetChildren()) do
        if v.Name:sub(1,4):lower() == "line" then
            local LineNumber = v.Name:sub(5)
            if LineNumber == "9" then
                v:Destroy()
            else
                v.Name = "line"..tostring(tonumber(LineNumber) + 1)
                v.Position = v.Position - UDim2.new(0,0,0,20)
            end
        end
    end
    newchatline = Instance.new("TextLabel",player:WaitForChild("PlayerGui").chatter.textboxy)
    if player then
        newchatline.Text = player.Name.. ": " ..message
    else
        newchatline.Text = "System Message: " ..message
    end     
    newchatline.Size = UDim2.new(1,0,0,20)
    newchatline.Position = UDim2.new(0,0,1,-20)
    newchatline.Font = "SourceSansBold"
    newchatline.TextColor3 = player:FindFirstChild("color").Value.Color
    newchatline.TextStrokeTransparency = 0
    newchatline.BackgroundTransparency = 1
    newchatline.BorderSizePixel = 0
    newchatline.FontSize = "Size18"
    newchatline.TextXAlignment = "Left"
    newchatline.TextYAlignment = "Top"
    newchatline.ClipsDescendants = true
    newchatline.Name = "line1"
    game:GetService("ReplicatedStorage").Chatted:InvokeServer(message)
end)

Server script: Message clones onto everyone's screens other than sender as intended, although it DOES NOT move the local message up one, for example if I send 3 messages "msg1""msg2""msg3" and then someone else sent one ("msg4") it would just overlap with message 3 and not send it up one rung of the ladder, if another person was to send a message after that it would move msg4 up but the local mesages would remain in place, I don't really understand this! From what I gather it is because the server script cannot access the local gui because of filtering enabled and therefore cannot move it up as it does not exist! The only way I can think of getting around this is by make everything client side, but I really wanted to do it this way in order to reduce lag!

Any ideas?

    local PG  = player:WaitForChild("PlayerGui")
    repeat wait() until PG:FindFirstChild("chatter")
    repeat wait() until PG.chatter:FindFirstChild("textboxy")
    for i,v in pairs(game:GetService("Players"):GetPlayers()) do
        local Parent = v:WaitForChild("PlayerGui").chatter.textboxy
        for i,v in pairs(Parent:GetChildren()) do
            if v.Name:sub(1,4):lower() == "line" then
                local LineNumber = v.Name:sub(5)
                if LineNumber == "9" then
                    v:Destroy()
                else
                    v.Name = "line"..tostring(tonumber(LineNumber) + 1)
                    v.Position = v.Position - UDim2.new(0,0,0,20)
                end
            end
        end
        if v.Name ~= player.Name then
            newchatline = Instance.new("TextLabel",v:WaitForChild("PlayerGui").chatter.textboxy)
            if player then
                newchatline.Text = player.Name.. ": " .. message
            else
                newchatline.Text = "System Message: " .. message
            end     
            newchatline.Size = UDim2.new(1,0,0,20)
            newchatline.Position = UDim2.new(0,0,1,-20)
            newchatline.Font = "SourceSansBold"
            newchatline.TextColor3 = player:FindFirstChild("color").Value.Color
            newchatline.TextStrokeTransparency = 0
            newchatline.BackgroundTransparency = 1
            newchatline.BorderSizePixel = 0
            newchatline.FontSize = "Size18"
            newchatline.TextXAlignment = "Left"
            newchatline.TextYAlignment = "Top"
            newchatline.ClipsDescendants = true
            newchatline.Name = "line1"
        end 
    end
    local Parent2 = game:GetService("StarterGui").chatter.textboxy
    for i,v in pairs(Parent2:GetChildren()) do
        if v.Name:sub(1,4):lower() == "line" then
            local LineNumber = v.Name:sub(5)
            if LineNumber == "9" then
                v:Destroy()
            else
                v.Name = "line"..tostring(tonumber(LineNumber) + 1)
                v.Position = v.Position - UDim2.new(0,0,0,20)
            end
        end
    end
    if newchatline then
        newchatline:Clone().Parent = game:GetService("StarterGui").chatter.textboxy
    end