Good question; I have seen this issue also.
My experience is a bit different, though. I see in the authenticated_hosts.csv that MVM attempts both SSHv2 Certificate and access via the five Windows methods that you show.
Here is an example. (host id edited)
IP Address DNS Name NetBios Name Asset Label Asset Criticality Operating System Asset Owner SSHv2 Certificate SSHv2 Credential SSHv1 Telnet WMI Accessible Remote Registry Remote File System Access Null Session Administrator Authentication Error Code Error Description 126.96.36.199 anyhost.com anyhost 10016058 3 Windows Server 2008 (Service Pack 2, Server, SQL Server, [++]) user noAccess 3001 Connection failed: ERROR (0x8007274d) : No connection could be made because the target machine actively refused it. 188.8.131.52 anyhost.com anyhost 10016058 3 Windows Server 2008 (Service Pack 2, Server, SQL Server, [++]) user No Yes Yes No Yes 0
Message was edited by: hendersonmc on 4/28/14 9:43:42 AM CDT