Those are some odd timestamps and I wonder how that happened. Looks like the filesystem is mounted over the network?
There is a way to change the timestamps with Terminal commands (can't remember how ATM), but why bother? A sparse bundle is really just a directory in the unix-like filesystem that Finder treats as a special package (similar to an app). I think the odd timestamps in your image are the create and modify times on the sparse bundle directory.
I would consider two options:
1.) do my best to determine if it's working ok (do some restores to a spare drive or something), and leave the timestamps alone, or
2.) delete it and start a fresh TM backup, just to eliminate possible problems should you need to do a full restore.
I really doubt the timestamps on the top-level directory (the sparse bundle) are used for anything in Time Machine. But one never knows for sure, thus choice 2!