Actually I wonder if they're "Features" or "Free-tures".
I've just tried this in a VM, and get the same sort of behaviour. Curiously the Sport app was left behind in the Start menu right panel. The Money app was there when I took the screenshot, but disappeared soon afterwards! The apps still seem to be there in All Apps, and seem to work when selected from there. A Restart brings a few more of them back, but the Start Menu area still looks fairly empty and I think is still missing several apps.
The VM was created as an experiment using the Windows 8.1 Media Creator, installing the 32-bit Core edition, then within 8.1 I ran the Setup from Build 10130 (ESD-to-ISO version), which means I've ended up with 10 Pro 32 bit.
I've not customised it at all apart from the above steps.
Thanks David. Good to know it's not just my system. An annoying bug, have tor report it.
I'm surprised that this is still the newest build.