Proper use, and cleanup, using multiple external hard drives

I am having a problem when I want to restore a file from an old backup. Acronis True Image Home 2010 fails when I try to have the restore function recreate the backup info when I point it to my backup drive. This could be because of the way I am using the program.

My backup methodology follows. Note that I use an external SATA drives and have to power off a system, power on the drive, then boot the system to use the drive.

- First Saturday of the month take a full backup of my system and my wife's system. What I mean by full backup is I take an image backup of my C: (I have 3 drives on my system), a full "Files & Folders" backup of all 3 drives, and then a System State to external drive A. I then hook the drive up to my wife's system and take an image backup of her C: (she only has a c: drive), a full "Files & Folders" backup, and then a System State to external drive A.
- Every Saturday I take an incremental (Files & Folders) backup of my 3 drives and then an incremental (Files & Folders) backup of my wife's system, to external drive A.
- The first Saturday of the next month I take an incremental backup of my 3 drives and then take an incremental of my wife's system, to external drive A. I then hook up drive B to my system and start the above process over again (take an image of my C:, then a full (Files & Folders) backup, then a System State, etc.) using external drive B for that month. External drive A is stored in my desk at work until the first Saturday of the next month.

When the first Saturday of the third month rolls around and I hook up external drive A, the Acronis program doesn't know anything about the backups that are on it. If I try to use the Restore function to have the program rebuild the database for my system (the Files & Folders backup), the program crashes after several minutes. I tracked it using Task Manager (Windows 7 64-bit) and it fails about the time the program begins using 2GB of memory. I am backing up over 300GB on my system.

I've read in other forum posts where you should only delete the backup files on the backup drive using the Acronis program. My problem is that when I hook up the drive, external A, that I used 2 months ago, the Restore function doesn't list any of the backups that are on it - so I simply delete the files from it and start the full backup process on the clean drive.

Do I need to do something different in the way that I am using the program? I am concerned that I'm having the problem rebuilding the database from an older drive due to the way I am using Acronis backup.

I really want to use the 2 external drives the way I have been as I am paranoid about only using one drive. I work in IT and am afraid of the possibility where I have deleted my full backup and my hard drive totally crashes before the full backup completes. The way I use Acronis now, I always have at least 1 full back up of my, or my wife's, system.

I have searched my system and the only thing I can find that looks like an Acronis database are .xml files at C:\Users\All Users\Acronis\LastBackups and C:\Users\All Users\Acronis\TrueImageHome\Database. They are usually only 1KB in size.

Any suggestions?