Local Mirror More or less ignored

Hallo,

at the moment i am preparing a new skolelinux system.

But the school here has a bad Internet, so i have created a debian mirror for installing and updates.

in the preseed file i have set the usual supects to use the lokal mirror but

in the middel if the install process the source for the packas ist switched.

from where is this config comming ?

only the udeb's are comming from the lokal mirror all the othe packages are requested from http.debian.net

part of /etc/debian-edu/www/debian-edu-install.dat

# Pass on the time zone used on the main-server
tzsetup-udeb    time/zone       select Europe/Vienna
choose-mirror-bin       mirror/country string manual
choose-mirror-bin       mirror/http/directory   string /debian/
choose-mirror-bin       mirror/http/hostname    string img.knallerbse.at
choose-mirror-bin       mirror/http/mirror      string img.knallerbse.at
choose-mirror-bin       mirror/protocol select http

squid log:

......

1456199909.155      0 10.0.0.2 TCP_MEM_HIT/200 12602 GET http://img.knallerbse.at/debian//pool/main/p/pkgsel/pkgsel_0.43_all.udeb - HIER_NONE/- application/x-debian-package
1456199909.681      0 10.0.0.2 TCP_MEM_HIT/200 7077 GET http://img.knallerbse.at/debian//pool/main/r/rdate/rdate-udeb_1.2-6_amd64.udeb - HIER_NONE/- application/x-debian-package
1456199909.710      1 10.0.0.2 TCP_MEM_HIT/200 92539 GET http://img.knallerbse.at/debian//pool/main/t/tzsetup/tzsetup-udeb_0.66_all.udeb - HIER_NONE/- application/x-debian-package
1456199910.273      2 10.0.0.2 TCP_MEM_HIT/200 186328 GET http://img.knallerbse.at/debian//pool/main/u/user-setup/user-setup-udeb_1.61_all.udeb - HIER_NONE/- application/x-debian-package
1456199910.851      2 10.0.0.2 TCP_MEM_HIT/200 122164 GET http://img.knallerbse.at/debian//pool/main/u/util-linux/fdisk-udeb_2.25.2-6_amd64.udeb - HIER_NONE/- application/x-debian-package
1456199910.898      0 10.0.0.2 TCP_MEM_HIT/200 53176 GET http://img.knallerbse.at/debian//pool/main/u/util-linux/libsmartcols1-udeb_2.25.2-6_amd64.udeb - HIER_NONE/- application/x-debian-pa
ckage
1456199910.935      1 10.0.0.2 TCP_MEM_HIT/200 130498 GET http://img.knallerbse.at/debian//pool/main/x/xfsprogs/xfsprogs-udeb_3.2.1_amd64.udeb - HIER_NONE/- application/x-debian-package
1456199912.122      3 10.0.0.2 TCP_MEM_HIT/200 396512 GET http://img.knallerbse.at/debian//pool/main/l/lvm2/lvm2-udeb_2.02.111-2.2_amd64.udeb - HIER_NONE/- application/x-debian-package
1456199912.328      3 10.0.0.2 TCP_MEM_HIT/200 373474 GET http://img.knallerbse.at/debian//pool/main/p/partman-lvm/partman-lvm_107_all.udeb - HIER_NONE/- application/x-debian-package
1456199913.217      1 10.0.0.2 TCP_MEM_HIT/200 84657 GET http://img.knallerbse.at/debian//pool/main/p/partman-auto-lvm/partman-auto-lvm_56_all.udeb - HIER_NONE/- application/x-debian-packag
e
1456199915.052      1 10.0.0.2 TCP_MEM_HIT/200 148582 GET http://img.knallerbse.at/debian//dists/jessie/Release - HIER_NONE/- -
1456199915.066      0 10.0.0.2 TCP_MEM_HIT/200 1102 GET http://ftp.skolelinux.org/welcome.msg - HIER_NONE/- -
1456199921.973    275 10.0.0.2 TCP_MISS/301 396 GET http://http.debian.net/debian//pool/main/p/partman-auto-crypto/partman-auto-crypto_22_all.udeb - HIER_DIRECT/5.153.231.35 text/plain
1456199921.974      0 10.0.0.2 TCP_MEM_HIT/200 6420 GET http://debian.anexia.at/debian/pool/main/p/partman-auto-crypto/partman-auto-crypto_22_all.udeb - HIER_NONE/- application/x-debian-pac
kage
1456199922.717     83 10.0.0.2 TCP_MISS/301 387 GET http://http.debian.net/debian//pool/main/p/partman-crypto/partman-crypto_81_amd64.udeb - HIER_DIRECT/5.153.231.35 text/plain
1456199924.655   1937 10.0.0.2 TCP_MISS/200 365754 GET http://debian.lagis.at/debian/pool/main/p/partman-crypto/partman-crypto_81_amd64.udeb - HIER_DIRECT/83.164.133.195 application/octet-s
tream
1456199925.621      0 127.0.0.1 TCP_MISS/200 2990 GET cache_object://localhost.intern/5min - HIER_NONE/- text/plain
1456199985.681      1 127.0.0.1 TCP_MISS/200 2991 GET cache_object://localhost.intern/5min - HIER_NONE/- text/plain
1456199997.816    499 10.0.0.2 TCP_MISS/302 338 GET http://http.debian.net/debian/dists/jessie/Release - HIER_DIRECT/5.153.231.35 text/plain
1456199997.820      2 10.0.0.2 TCP_MEM_HIT/200 148584 GET http://debian.sil.at/debian/dists/jessie/Release - HIER_NONE/- -
1456199998.091    258 10.0.0.2 TCP_MISS/302 344 GET http://http.debian.net/debian/dists/jessie/Release.gpg - HIER_DIRECT/5.153.231.35 text/plain
1456199998.093      0 10.0.0.2 TCP_MEM_HIT/200 2742 GET http://debian.lagis.at/debian/dists/jessie/Release.gpg - HIER_NONE/- application/octet-stream
1456199998.696    343 10.0.0.2 TCP_MISS/302 362 GET http://http.debian.net/debian/dists/jessie/main/binary-amd64/Packages.gz - HIER_DIRECT/5.153.231.35 text/plain
1456199998.816    119 10.0.0.2 TCP_HIT/200 9034406 GET http://debian.lagis.at/debian/dists/jessie/main/binary-amd64/Packages.gz - HIER_NONE/- application/octet-stream
1456200007.384   1594 10.0.0.2 TCP_MISS/301 389 GET http://http.debian.net/debian/pool/main/a/acl/acl_2.2.52-2_amd64.deb - HIER_DIRECT/5.153.231.35 text/plain
1456200007.386      0 10.0.0.2 TCP_MEM_HIT/200 58759 GET http://debian.lagis.at/debian/pool/main/a/acl/acl_2.2.52-2_amd64.deb - HIER_NONE/- application/octet-stream
1456200009.177   1758 10.0.0.2 TCP_MISS/301 393 GET http://http.debian.net/debian/pool/main/a/acl/libacl1_2.2.52-2_amd64.deb - HIER_DIRECT/5.153.231.35 text/plain
1456200009.179      0 10.0.0.2 TCP_MEM_HIT/200 28309 GET http://debian.lagis.at/debian/pool/main/a/acl/libacl1_2.2.52-2_amd64.deb - HIER_NONE/- application/octet-stream
1456200009.690      0 127.0.0.1 TCP_MISS/200 3050 GET cache_object://localhost.intern/info - HIER_NONE/- text/plain

thx in av for any help to slove this problem.

mario