The questions page (/questions) remembers which tab (newest, featured, frequent, votes, etc.) you selected previously when you return to the page. Some of these are for sorting and some for filtering. Newest is the default tab, and will show all questions.
Try the following:
- Click a different tab (e.g. newest)
- Go to the landing page
- Click the complete list of questions link
- Observe that the questions list's content has changed (should be all questions if you last clicked newest)
The featured questions link you've provided even contains a parameter specifying the "featured" tab (sort=featured), though this might be intentional on your part, for the sake of explanation. I haven't bothered testing to see if a parameter is included on the page.
For anonymous users, they see a button that says "browse more questions":
Logged in users see something else:
I suppose that the team expects users with accounts to know how /questions works, and the tab remembering behaves the same whether you're logged in or not (I have not tested whether it persists across log in/out). Technically, you are taken to the complete list of questions, you've simply chosen to filter it. But I agree that this behavior can be confusing. I didn't understand what was going on the first few times it happened to me.