why I have 2 swap paritions?

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http://askubuntu.com – I'm new in using Ubuntu, Ijust installed ubuntu 12.10 and everytime I start up the pc, a message tell me to mount manually the swap. This is my current situation: sudo blkid /dev/sda1: UUID="fa675e68-de82-4257-8960-bb312d08e113" TYPE="ext2" /dev/sda5: UUID="NLQ7rm-qbYa-QS4y-If3b-nLaY-FHZq-Dklhr8" TYPE="LVM2_member" /dev/mapper/ubuntu-root: UUID="bf5875d5-5cdd-4b08-a16e-168f75e535e9" TYPE="ext4" /dev/mapper/cryptswap1: UUID="1acc7002-dc75-452d-b46f-034c03c00f5e" TYPE="swap" in the etc/fstab: # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique id (HowTos)