Problems with backup (Possible bug)

Well, I'm not sure if this is a bug or intended.

About 2 months ago I had the backup utility gzip backups. I then changed it not to gzip because it was causing more load than I wanted. It left te gzipped backups in the backup directory. I went to restore a backup today and it restored that 2 month old gzip. I had to rename the gzip (I didnt want to remove until I knew there was a recent backup somewhere), and it;s now restoring the proper backup. I'm not sure if this is intended, but if anyone has done something similar in changing the gzip setting, check your backup directory for leftover gzips.