Reboot boots from non-selected volume

Had to perform a Time Machine restore but now anytime a reboot occurs, the machine (10.8.2) boots from a volume other than what is selected in System Prefs. The desired system can only be booted to by pressing the Option key at boot and then clicking the already-selected arrow.

The desired boot volume is "SolidState", below labeled as disk0s2. Performing a reboot will result in booting from "TimeMachine" (disk2s2) which has OS 10.6.8 on it. Curiously, after this volume is booted to, System Prefs still reports the selected boot volume is "SolidState".

diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *128.0 GB disk0

1: EFI 209.7 MB disk0s1

2: Apple_HFS SolidState 126.5 GB disk0s2

3: Apple_Boot Recovery HD 1.2 GB disk0s3

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.1 GB disk1

1: EFI 209.7 MB disk1s1

2: Apple_HFS Octo 499.8 GB disk1s2

/dev/disk2

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.1 GB disk2

1: EFI 209.7 MB disk2s1

2: Apple_HFS TimeMachine 497.8 GB disk2s2

3: Microsoft Basic Data LINUXBACK 2.0 GB disk2s3

/dev/disk3

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.5 TB disk3

1: EFI 209.7 MB disk3s1

2: Apple_CoreStorage 1.5 TB disk3s2

3: Apple_Boot Boot OS X 134.2 MB disk3s3

/dev/disk4

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS OctoTime II *1.5 TB disk4

Have booted into the Recovery partition, repaired permissions, repair disk, all to no effect. No problems reported either.

Any ideas? Thanks!