You would build the interface to be part of a Site. Current recommendations are to make sure all end users see a Site and don't have access to Tempo (unless you have a special reason to, or are working with a legacy application that was designed for Tempo access, which it sounds like you're not).
Also: if you click on a task link in the interface editor, you (as a designer) will be linked to the task in the Tempo interface, that's sort of a legacy 'feature' -- but when clicking through from a site, basic users will generally NOT be taken to Tempo, in case this is what you were seeing and worrying about.