I think I may have posted i the wrong forum a couple of days ago here: https://www.virtualmin.com/node/66932. Apologies, second time lucky.
I have 2 domains managed by Webmin/Virtualmin.
Site A: jonhogg.com and: Site B: inthatmovie.com
Site A shows the content of Site B. Site A also somehow has the LetsEncrypt certificate of Site B, and is displaying it's content.
Site A has the correct root folder specified so it's not that it's pulling from Site B's public_html folder
I'm not really sure when or how exactly this happened as it's been a month or two I've been playing round with it, but any help appreciated.
Happy to post whatever screenshots or config files are needed.