If the third party backup software isn't updating the backup tables in msdb (system database), then you need to test restoring from those backups. Windows file-level backups generally don't work for restoring databases, because the log file backup and data file backup aren't guaranteed to be synchronized correctly. Have you tested restoring from those backups? (Ignore the diff backup for now. Make sure you can restore from the third-party backups, if you haven't already.)
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
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