Ok, it does appear that switching to Mobile view for the forum problems I have reported. The desktop view and the mobile view are nearly identical visually, and there’s no way to tell what view you’re on unless you go into the menu, or you recognize a bunch of broken things in a mobile-looking interface being a “desktop view”.
Clearing the website data in Safari iOS preferences for miralou.com does show that mobile view is the default when logging in to the forum.
Thank you for your help. This is a problem with the way desktop view looks confusingly like a broken version of the mobile view, and doesn’t look like a “desktop view” of a website to users.