The two backups you show were taken days apart, one on the Jan 17, and one on the 20th.
It looks from those that they will not recover ... I just ran a catalog job, here are the catalog files, created for just x1 catalog backup.
-rw-r--r-- 1 root root 1343 Jan 27 08:30 CatBack_Disk_1327652989_FULL
-rw-r--r-- 1 root root 1272 Jan 27 08:30 CatBack_Disk_1327653007_FULL
-rw------- 1 root root 7805 Jan 27 08:30 CatBack_Disk_1327653007_FULL.f
-rw-r--r-- 1 root root 1790 Jan 27 08:30 CatBack_Disk_1327653035_FULL
-rw------- 1 root root 67490 Jan 27 08:30 CatBack_Disk_1327653035_FULL.f
The first is the [parent job, the other x2 are the actual backups, See how the ctimes are all close together (this may differ if the catalog is large, but not by 3 days).
I suspect the 'on-disk' copy may be ok but I cannot tell.
I recommend, for the moment, you forget multiple copies, and just runa couple iof Full catalog backups to tape. You probably do have some on disk, but these are no good if you have a system crash and it corrupts the disks, or, disk failure etc ...
Martin