This is for both of you:
You have to change the ports in your server config or your startup parameters.
If you have done this, also don't forget to delete the existing port mapping(s) from the container template and create new one(s) with the according port(s) that you've set in the config/start up parameters as the host and container port(s) (and also don't forget to choose the right protocol too!).
The existing ones won't work anymore because you've changed it in the config/start up parameters.
Also please don't try to attempt to change only the ports which are also exist currently in the template, that won't work for most games, you have to change them in the config/start up parameters, delete them and create new ones with container and host port set to the ones from the config/start up parameters.