Were you activating the remaining LVs during setup?
I believe, I hit the activate to switch actions after doing the create steps in sidu-disk-center. After it completed, I'd run lvscan in a terminal window and get:
ACTIVE '/dev/saturn/root' [10.0 GiB] inherit
ACTIVE '/dev/saturn/home' [9.0 GiB] Inherit
Did you try to set them all up in the installer?
all the logical volumes are listed at the "Root File System" selection screen. It lets me choose to put my root on:
mapper/saturn-root
sda
saturn/root
saturn/home
Are the remaining LVs formatted with a file system or raw devices?
I've tried raw and I've tried after i've formatted them with:
mkfs.ext4 -L home /dev/saturn/home
mkfs.ext4 -L root /dev/saturn/root
Did a miss a step on activating the LVs?