Why there is no automatic flag on automatically added libraries?

I'm running Debian Jessie, when I run aptitude I can see a lot of libraries not manually installed but without the automatic flag. So if I remove the main packages the dependent packages will stay.

My question is why theses not manually installed packages are not marked with the automatic flag?

If needed, here is my /etc/apt/sources.list

deb http://ift.tt/LZG23Z testing main
deb-src http://ift.tt/LZG23Z testing main

deb http://ift.tt/A2rwP6 testing/updates main
deb-src http://ift.tt/A2rwP6 testing/updates main

deb http://ift.tt/LZG23Z testing-updates main
deb-src http://ift.tt/LZG23Z testing-updates main

#Added by myself
deb http://ift.tt/LZG23Z unstable main
deb http://ift.tt/LZG23Z experimental main

P.S.: The last two lines were added to obtain the last version of iceweasel.