It seems the installer didn't save sda2 as /home during installation. From what I can see, the installer sets up /media/diskXpartX when the partition isn't given a mount point.
If that's the case, then, /home was created in / (root), and, to fix this, you will have to change the entry in fstab (Since it already has a UUID, it simplifies things.), but, not before reading this manual entry:
http://manual.siduction.org/en/home-en.htm#home-buSince sda2 is already mounted at /media/disk1part2, you can just copy your current /home in root to the new home on sda2 by doing:
cp -pr /home /media/disk1part2
Then, it would just be changing the mount point for sda2 in fstab, along with any options following the mount point. On the one ext4 partition I have that has the /media/disk1part2 mount point, the options are different from my /, /home and /work partitions.
I'd also wait to see if other forum members confirm what I'm seeing, or, correct me for the assumptions I've made.
It's an easy fix if I read it right, so, let's see what others say.
Showing us what fstab looks like will help also.