Default Touchpad Partition Sizing

I've updated to CM10.1 and following this CM11 using ACMEInstaller5. I think the partition sizes have messed up though, lvm lvscan shows cm-data as only 1.5gb (Android's Settings >> Storage shows as 1.48gb total space and only 162MB remaining), /dev/store/media is 8gb. I've got the 16gb touchpad, so something's gone wrong somewhere!

Another issue from the CM10.1 update is WebOS doesn't allow new app updates or installs - everything comes up "install failed", meaning I can't get into HP App Catalog to install Pre-Ware or Tailor. I can access novacom, adb etc, though when I try to extend2fs the /dev/store/media partition it says there's a problem with the super-block.

Any ideas or help? Much appreciated!