LTS updates in disapperars in archivied versions

[Piviul <piviul@riminilug.it>]

Hi all, I'm new in this list and I hope my trivial problem doesn't 
concern an annoyance trivial matter...
Well, I have noted that my wheezy installed packages are newer than the 
one in the archived repository... so I ask you what happens to LTS 
updates when a debian version ends his LTS support and it is archived.
I was thinking that all LTS security updates was archived to the debian 
archive repository but this doesn't seems to match my wheezy: some 
packages are in a version newer than the one in debian archive and I 
think this updates derives from the LTS security updates...
For example winbind:
> $ apt-cache policy winbind
> winbind:
>   Installed: 2:3.6.6-6+deb7u16
>   Candidate: 2:3.6.6-6+deb7u16
>   Version table:
>  *** 2:3.6.6-6+deb7u16 0
>         100 /var/lib/dpkg/status
>      2:3.6.6-6+deb7u7 0
>         500 http://archive.debian.org/debian/ wheezy/main amd64 Packages

There is a further repos where LTS security updates are archived?

Best regards

Piviul
Piviul