why does the teleporter not wait a few seconds before teleporting me again?

Hello! I come with a solution! The code below is simple and easy to modify for your game and I will instruct you how to do so. Let me know if you need any help! All you need to do is create a script anywhere in the workspace and put the code in there. Then change lines 1 and 2 to be the parts you want the player to teleport to and from.

local pad1 = workspace:WaitForChild("TelePart1") --Change "TelePart1" to the name of the part the player touches to teleport to the other part
local pad2 = workspace:WaitForChild("TelePart2") --Change "TelePart2" to the name of the part the player gets teleported to

local cooldownTime = 5 --This is the number of seconds before the player can teleport again
local teleportHeight = 50 --Change this to how many studs above the teleport pad you want the player to teleport to

--The code below does not need to be modified

local teleportPads = {pad1,pad2} --Table with both teleport pads
local cooldown = false --Bool that stops player from quickly teleporting back and forth

for i, pad in ipairs(teleportPads) do
    pad.Touched:Connect(function(part) --If player touches either teleport pad
        if part.Parent:FindFirstChild("Humanoid") and cooldown == false then --If the touching part is a player and the cooldown is over
            local humanoid = part.Parent:FindFirstChild("Humanoid")
            cooldown = true
            if pad == pad1 then
                part.Parent.HumanoidRootPart.CFrame = CFrame.new(pad2.Position.X,pad2.Position.Y+teleportHeight,pad2.Position.Z) 
            else
                part.Parent.HumanoidRootPart.CFrame = CFrame.new(pad1.Position.X,pad1.Position.Y+teleportHeight,pad1.Position.Z) 
            end
            wait(cooldownTime) --The wait time before the player can teleport
            cooldown = false
        end
    end)
end

The problem with your script was the fact that there was no way to prevent the script from firing again once it touched another part; the wait() at the end of the script just makes the script wait before ending it, so multiple limbs could come into contact with the buttons and cause the script to fire multiple times, which results in an endless loop of teleportation.

To prevent this, add "script.disabled = true" to the script like this:

script.Parent.Touched:Connect(function(part) 
    local humanoid = part.Parent:FindFirstChild("Humanoid")
    local button1 = script.Parent
    local button2 = workspace["TelePart"] --  change this to the name of the brick you're teleporting the player to
    if humanoid then -- if a humanoid is found then
        part.Parent.HumanoidRootPart.CFrame = CFrame.new(button1.Position) -- teleport the player
        button2.Script.Disabled = true
        script.Disabled = true
        wait(3) -- determines how long the teleport is disabled for
        button2.Script.Disabled = false
        script.Disabled = false
    end
end)

This also disables any extra teleport scripts (such as one located in the part you're teleporting the players to) to prevent the script from teleporting the player back to the original part. If you don't have any extra scripts, remove these lines

button2.Script.Disabled = true

and

button2.Script.Disabled = false