Different landing page for desktop vs mobile theme?

No worries. I should have linked to instructions here too! There is a nice illustrated set of instructions you can check out here. It’s possible you might be on the latest version of Discourse, in which case the UX for themes and components has changed a little. Let me know if the instructions I linked to still leave you a little lost. I’d be happy to help you figure it out.

By the way, the topic below is the home of this theme component now: