Hi guys. There’s an active A/B test (perhaps more correctly labelled an “A/B/C” test as it has three options…) running at the moment, collecting data on the impact of changing the default sort order on the marketplaces. There’s some general info about this process here: Further tests on Market Search / Category / Home pages
You’ll see a different default view depending on which test segment you have been enrolled into: some will see New Items, others will see Top Sellers, others will see Trending Items. That will also vary by marketplace and browser.
I’ll raise the issue with the “All New Items” button with the development team working on this, as that one does look like a bug (i.e. it takes you to your default view, rather than loading a view that is sorted by New Items).