Cannot change listening port from installer

This is how I reproduced:

1. Download Confluence 5.6.3 Linux 64bit Installer from here
2. Execute the downloaded installer
3. Set custom value for HTTP and Control ports during the installation
4. Confirmed the installed Confluence does not listen the customized port but the default port 8090 (this is the problem)

We can work around it by changing the listen port after the installation.