parted fails to 'not use' an existing LVM partition

ubuntu 8.04 (hardy heron) alternate install CD

(parted) p
Model: ATA ExcelStor Techno (scsi)
Disk /dev/sda: 165GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
 1 1049kB 45.2GB 45.2GB primary ntfs boot
 2 45.2GB 45.5GB 296MB primary ext3 fed7 /boot
 3 45.5GB 45.8GB 313MB primary ext3 planned gobuntu /boot
 4 51.0GB 132GB 81.1GB extended
 5 51.0GB 53.0GB 2056MB logical linux-swap fed7 swap
 6 53.0GB 54.1GB 1028MB logical ext3 fed7 /
 7 54.1GB 80.4GB 26.3GB logical lvm fed7 volume group
 8 89.0GB 91.1GB 2122MB logical linux-swap planned gobuntu swap
 9 91.1GB 102GB 10.5GB logical ext3 planned gobuntu /usr
10 102GB 109GB 7337MB logical ext3 planned gobuntu /home
11 109GB 111GB 2122MB logical ext3 planned gobuntu /var
12 111GB 112GB 1077MB logical ext3 planned gobuntu /tmp
13 112GB 117GB 5239MB logical ext3 planned gobuntu /

During CD installation - when running 'parted'
selected manual partitioning
I found the dialog unclear as to what 'parted' would do with partitions that were already in use.
For each partition I did not want to be used I selected the option - 'do not use'. If I did not, my gut feeling, was that the install would have used both swaps and maybe even other existing linux partitions.
This worked fine until the LVM was selected to be 'not used'. The 'do not use' option was not accepted/changed - no error. Work around was to change the LVM partition to 'use as ext3' then tell install/'parted dialog' 'not to use'.