It sounds like you have two sets of backups on that drive.
Were some backups made over a network (ie, while the drive was connected to a Time Capsule, Airport Extreme, or other Mac)? That's the only way you get a disk image (unless you specifically created one).
The name "MacbookPro.tmp" sounds like the temporary name Time Machine first creates a disk image with, over a network. That would also explain why it can't be opened, as TM didn't finish creating it, but that doesn't tell us where the backup you ran on 11/20 went. Are you sure it completed normally? No error messages, etc.?
Also, did you format the new drive?