Congrats! And this also for others who stumble upon this .... Webmin is a great tool for admin of a Linux server. Perl based ... uses, by default, another port other than 80 and can/does allow the admin user to update Webmin itself. When working with config of varous services, like Apache, Webmin actually edits the same config files found via command line.
While Webmin is a great tool, all tools may develop issues from time to time (and invariably when you need them to work) so it's probably a good idea to explore via command line what webmin did to those config files. This increases your knowledge of what's where, etc. AND provides you 2 ways .... webmin interface ... and just in case it goes south, you still have command line. ;)
'spirit of sharing', Ken