[igraph] closeness centrality question

[Alvaro Graves Fuenzalida]

Hi, I'm working with closeness centrality but there is something I don't 
get if it's correcto or not:

If I have the following graph

0---1---2

the centrality is

0 -> 0.666667
1 -> 1.000000
2 -> 0.666667

which makes sense. However if I add another unconnected edge 3---4 then 
I have

0 -> 0.307692
1 -> 0.333333
2 -> 0.307692
3 -> 0.250000
4 -> 0.250000


According to the documetation "If the graph is not connected, and there 
is no path between two vertices, the number of vertices is used instead 
the length of the geodesic", but still the numbers don't fit. Can 
somebody tell me if there is a mistake or I misunderstood something?

Thanks in advance