A client of ours, running multiple backup jobs with multiple media sets, ran into this. Following a failed backup job with one of these media sets (NB: NOT Media Set 1), a NEW, BLANK tape cartridge was loaded to rerun the job. No sooner had the cartridge loaded and been inventoried, but it was imported into the media set used by the last backup.
Does BackupExec retain media settings from the last job until the next one is actually active, or is there some other mechanism at work in this instance?