Where are you trying to view the swap? Try this:
sudo /sbin/swapon -s
Filename Type Size Used Priority/dev/mapper/sys-swap partition 2031608 0 -1
Also in the GUI under system tools you can use the LVM tool to view what you have set up.
For the CDROM issue, post your fstab. Other than those, it's really hard to blame the problems on LVM, but can't rule it out I suppose.