ATIH 2013 can't delete a file that isn't there

Every time I run ATIH it does a correct backup and seems to be managing its files just fine. BUT.. every time it runs it generates an error:
14 Information 1/8/2014 1:05:44 AM Consolidate Backup Archive Location: "\\192.168.100.4\bernie-nas\Backups\DellBackup_2014-01-08_DellBackup_inc_b8_s5_v1.tib" Destination: "\\192.168.100.4\bernie-nas\Backups\DellBackup_2014-01-08_DellBackup_inc_b8_s5_v1_85D13926-0E4F-430F-A145-37ED52D06D20.tib"
15 Information 1/8/2014 1:05:44 AM Consolidate Backup Archive Location: "\\192.168.100.4\bernie-nas\Backups\DellBackup_2014-01-08_DellBackup_inc_b8_s5_v1.tib" Destination: "\\192.168.100.4\bernie-nas\Backups\DellBackup_2014-01-08_DellBackup_inc_b8_s5_v1_85D13926-0E4F-430F-A145-37ED52D06D20.tib"
16 True Image 1/8/2014 1:05:45 AM Failed to open backup \\192.168.100.4\bernie-nas\Backups\DellBackup_2013-12-13_DellBackup_inc_b2_s4_v1-2.tib. Make sure the backup location is accessible and contains all versions of the backup. This backup may also be corrupted.
18 True Image 1/8/2014 1:05:45 AM
19 True Image 1/8/2014 1:05:45 AM The specified file does not exist.
20 True Image 1/8/2014 1:05:45 AM The system cannot find the file specified
21 True Image 1/8/2014 1:15:45 AM Failed to open data stream. Try to remove the backup from the list, add it again by clicking 'Browse for backup' and recreate the backup settings.
22 True Image 1/8/2014 1:15:45 AM Failed to open backup \\192.168.100.4\bernie-nas\Backups\DellBackup_2013-12-13_DellBackup_inc_b2_s4_v1-2.tib. Make sure the backup location is accessible and contains all versions of the backup. This backup may also be corrupted.
23 True Image 1/8/2014 1:15:45 AM Failed to open backup \\192.168.100.4\bernie-nas\Backups\DellBackup_2013-12-13_DellBackup_inc_b2_s4_v1-2.tib. Make sure the backup location is accessible and contains all versions of the backup. This backup may also be corrupted.
25 True Image 1/8/2014 1:15:45 AM
26 True Image 1/8/2014 1:15:45 AM The specified file does not exist.

Notice the date on the file is last december. At the end of december I changed come parameters and the backup has been doing fine. The new/current backups are in the directory:

DellBackup_2013-12-29_DellBackup_full_b7_s1_v1.tib
DellBackup_2013-12-30_DellBackup_inc_b7_s2_v1.tib
DellBackup_2013-12-31_DellBackup_inc_b7_s3_v1.tib
DellBackup_2014-01-01_DellBackup_inc_b7_s4_v1.tib
DellBackup_2014-01-02_DellBackup_inc_b7_s5_v1.tib
DellBackup_2014-01-03_DellBackup_inc_b7_s6_v1.tib
DellBackup_2014-01-04_DellBackup_full_b8_s1_v1.tib
DellBackup_2014-01-05_DellBackup_inc_b8_s2_v1.tib
DellBackup_2014-01-06_DellBackup_inc_b8_s3_v1.tib
DellBackup_2014-01-07_DellBackup_inc_b8_s4_v1.tib
DellBackup_2014-01-08_DellBackup_inc_b8_s5_v1.tib

I deleted several old backups [dating from November] by hand. And that seems to have caused no trouble at all *except* that it keeps trying to re-delete
DellBackup_2013-12-13_DellBackup_inc_b2_s4_v1-2.tib

I just tried something that might work: I just created the file. Not an actual backup file [in fact, it is just an empty file], but at least it has the right name. didn't work:
I did a backup, and the backup was successful, but now I get a different error

Failed to open DellBackup_2013-12-13_DellBackup_inc_b2_s4_v1-2.tib. Make sure the location is accessible and contains all versions of the backup.

Of course it can't, since I deleted that backup by hand. How can I get ATIH to just "forget" that backup [or at least that one file from that old backup]