If you do ping emonpi what ip addresses it resolves to?
pi@emonpi(ro):~$ ping emonpi
ping: icmp open socket: Operation not permitted
Interestingly though, I can ssh to 127.0.1.1 and it connects. Where does that IP come from and why is it listed?
[EDIT] Answered my own question
pi@emonpi(ro):~$ cat /etc/hosts
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
127.0.1.1 emonpi
Still wondering why though…
[EDIT#2]… Answer here
Still think its an error to display it on the Server page though 
There you have it, it comes from the /etc/hosts file.
It’s explained on this link: what does 127.0.1.1 mean ???
I agree, looking at the manual, seems to say 127.0.1.1 is there for a workaround and is not the norm. A very commonly used workaround perhaps 