Virtual meters doesnt work anymore !
For information for everybody :
You can't edit virtual meters anymore, see the zipato answer below :
"Problems which you are experiencing with virtual meter are related to
the current UI version. Currently we have in preparation new UI which
will not have this bug as it is using different data for showing device
On the current UI this will not be debugged as new one should be released within 1-2 weeks from now.
I must ask you for a little patience until new UI is released."
Note : My ask was as on the 15 October...