preseed help. swap partitions way too big

[jdh239]

I have 2 - 500 GB drives.

What I want:
I wish to have 1 swap partition on each drive no larger than 12 GB (please don't ask me why so large).... so a total of 24 GB of swap space
I wish to have the remaining space put under a RAID1 setup for the root partition.

What I currently have:
My following configuration gives me a / partition of about 218 GB (in a RAID1 setup as desired), and two swap partitions that take up the remaining space. I don't know where I have misconfigured it. Please help.

myserver:~$ df -h
Filesystem Size Used Avail Use% Mounted on
udev 48G 4.0K 48G 1% /dev
tmpfs 9.5G 784K 9.5G 1% /run
/dev/md0 218G 1.9G 205G 1% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
none 5.0M 0 5.0M 0% /run/lock
none 48G 0 48G 0% /run/shm
none 100M 0 100M 0% /run/user

myuser@myserver:~$ swapon -s
Filename Type Size Used Priority
/dev/sda2 partition 256940028 0 -1
/dev/sdb2 partition 256940028 0 -2

myuser@myserver:~$ free -h
total used free shared buffers cached
Mem: 94G 1.5G 92G 792K 18M 599M
-/+ buffers/cache: 908M 93G
Swap: 490G 0B 490G


#================================================= ==========================================
# PARTMAN PARTITIONING SECTION START
#================================================= ==========================================

d-i partman-md/confirm_nochanges boolean true
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-md/device_remove_md boolean true
d-i partman-lvm/confirm boolean true

d-i partman-partitioning/confirm_write_new_label boolean true
d-i partman/choose_partition select finish
d-i partman/confirm boolean true
d-i partman/confirm_nooverwrite boolean true
d-i partman-md/confirm boolean true
d-i partman-md/confirm_nooverwrite boolean true
d-i partman-basicfilesystems/no_mount_point yes
d-i partman-basicmethods/method_only boolean false

d-i partman-auto/method string raid
d-i partman-auto/disk string /dev/sda /dev/sdb

# <raidtype> <devcount> <sparecount> <fstype> <mountpoint> <devices> <sparedevices>

d-i partman-auto/expert_recipe string \
root-swap :: \
237000 237000 -1 raid \
$primary{ } $bootable{ } method{ raid } format{ } \
. \
1024 6114 25% linux-swap \
$primary{ } method{ swap } format{ } \
.

d-i partman-auto-raid/recipe string \
1 2 0 ext4 / \
/dev/sda1#/dev/sdb1 \
.

#================================================= ==========================================
# PARTMAN PARTITIONING SECTION END
#================================================= ==========================================