How to make your character spawn where they are supposed to??

Make sure neutral is disaled and AllowTeamChangeOnTouch is enabled. Also try making a different team color for each checkpoint.

Insert a normal Script in each of the parts and add the code to make the player return where they left off after they died.

local spawn = script.Parent -- Find where the part is
spawn.Touched:connect(function(hit) -- When the player touches the part
    if hit and hit.Parent and hit.Parent:FindFirstChild("Humanoid") then -- If the player who touches the part is a humanoid
        local player = game.Players:GetPlayerFromCharacter(hit.Parent) -- Find any players
        local checkpointData = game.ServerStorage:FindFirstChild("CheckpointData") -- Creates some sort of Data Store
        if not checkpointData then
            checkpointData = Instance.new("Model", game.ServerStorage)
            checkpointData.Name = "CheckpointData"
        end

        local checkpoint = checkpointData:FindFirstChild(tostring(player.userId))
        if not checkpoint then
            checkpoint = Instance.new("ObjectValue", checkpointData)
            checkpoint.Name = tostring(player.userId)

            player.CharacterAdded:connect(function(character) -- When the player respawns
                wait()
                character:WaitForChild("HumanoidRootPart").CFrame = game.ServerStorage.CheckpointData[tostring(player.userId)].Value.CFrame + Vector3.new(0, 4, 0) -- Teleport to where they left off after they've touched the part in that position
            end)
        end

        checkpoint.Value = spawn
    end
end)