What Jeffro said.
The use of "Land" is an attempt to be politically correct. Example: Taiwan. By calling it a "land", they aren't pissing off the chinese, who consider Taiwan part of their territory. "Land" also may referr to an autonomous region. Example "Azores", are a group of islands that belong to Portugal. Yet, in the Yearbook report, they have been treated treated as a separate territory than the mainland Portugal (same for Madeira island too).
WT geography isn't necessarily tied to geopolitics.