Help with APT and Debian

[Mailing List]

When I run 
apt-get update;apt-get -u -t sarge dist-upgrade

I get a different number of packages that
need upgrading than when I run

apt-get update;apt-get -u -t testing dist-upgrade

Which is a different number of packages then when I
run the two commands with the unstable branch commented
out.  The Default-Release should ignore the unstable
branch by default, right?

Help.
========================================================
apt.conf
APT::Default-Release "sarge";
APT::Cache-Limits 99165824;

======================================================
source.list
#deb http://mirror.direct.ca/linux/debian/ unstable main non-free contrib
#deb-src http://mirror.direct.ca/linux/debian/ unstable main non-free contrib
deb http://mirror.direct.ca/linux/debian/ sarge main non-free contrib
deb-src http://mirror.direct.ca/linux/debian/ sarge main non-free contrib
deb http://mirror.direct.ca/linux/debian/ stable main non-free contrib
deb-src http://mirror.direct.ca/linux/debian/ stable main non-free contrib

deb http://debian.yorku.ca/debian/ sarge  main non-free contrib
#deb-src http://debian.yorku.ca/debian/ sarge  main non-free contrib

deb http://ftp.us.debian.org/debian/ sarge main non-free contrib
deb-src http://ftp.us.debian.org/debian/ sarge main non-free contrib
deb http://non-us.debian.org/debian-non-US sarge/non-US main contrib non-free
deb-src http://non-us.debian.org/debian-non-US sarge/non-US main contrib non-free

deb http://security.debian.org/ sarge/updates main contrib non-free
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