E/I filter for one specific service : several issues

[thiuyendang]

When exporting/importing using filter for one specific service, result is different, depending if the service is linked to one or several hosts.

If service exists for several hots (Ping), then only one host is exported with all services (probably the first one that has been created).

If service exists only for one host, this service is exported with host+all services anyway, whereas user could expect only one service to be exported