Privite IP's showing up through WAN

[whocares256]

I'm a new user. I have been using Pfsense since December and have been a long time mono-wall user. The issue I have is on the ATT network I can see private ip address that are not on my local network. I have a second dsl provider that that does not happen. Both providers are using a TD-8817 DSL modem. The only difference between the providers is that the working provider uses DHCP and ATT uses PPPoE.

Screenshots can be seen here:  http://www.dslreports.com/forum/r28301721-DSL-Privite-IP-s-Showing-up-through-WAN

Any Thoughts or know a way to have this not happen?

Thanks and Regards,

Thomas

Edit: Added above 4 lines.