Automated Outbound NAT Entries for WAN and _lo0_network

[pasha-19]

Can someone explain the difference between the following two Source Networks, Loopback Networks and 127.0.0.0/8 as they appear in the Outbound NAT entries for the WAN?  To me they may be redundant.  It seems these would probably be the same as the internal __lo0_network alias that is created.  Please explain if there are any differences between the three references.  Thanks