This is because the default "Ubuntu Online Accounts" (uoa) are different than "Gnome Online Accounts" (goa).
- GOA have a little halfglobe-plug icon
- UOA have a little globe-with-keys icon
Yours are GOA accounts, so they do not show in the UOA (default) online account interface.
Here is how you can get to them.
Go to a command line prompt and run the following, which will bring up the standard System Settings inteface, however it will now contain the GOA and UOA icons.
env XDG_CURRENT_DESKTOP=GNOME gnome-control-center
This is clearly confusing as noted in:
My issue is that GOA is what evolution now uses as the UOA package seems to have disappeared from current saucy as of 3.8.5-1ubuntu3.
evolution-data-server-goa (adds GOA accounts to evolution, as in your example above).
evolution-data-server-uoa (adds UOA accounts to evolution, which is more desirable IMHO).