Thanks folks for looking into this for me -

I'm using Ola Hallengren's backup scripts and the @CopyOnly switch has not been altered from its default of 'N':

sqlcmd -E -S $(ESCAPE_SQUOTE(SRVR)) -d master -Q "EXECUTE [dbo].[DatabaseBackup] @databases = 'USER_DATABASES', @Directory = N'\\backup_dir', @BackupType = 'FULL', @verify = 'Y', @Compress = 'Y', @CleanupTime = 337, @checksum = 'Y', @LogToTable = 'Y'" -b

And 20140803 was definitely the last FULL backup on this database taken via that job.

But speaking of intervening FULL backups...

I do see something odd with msdb..backupset -

I have a unique service account running for my SQL Server services, but NT AUTHORITY\SYSTEM is still producing backups... :alien:

My backup script job takes a FULL once per week, but some process using NT AUTHORITY\SYSTEM is taking a FULL backup every night... where is this coming from and where are those backups going???