Mac 10.6 - Time Machine Backups

30 Mac's on 10.6.6. They all time machine backup to a Mac Mini Server with an attached 'Backups' NAS.

All the backups exist but there seems to be some with multiple entries for their names (see attached) named
computername.sparsebundle (this is the latest\right one?)
computername_date.sparsebundle

I can't delete the _date ones (the icons have a lock next to them).
When migration assistant runs (which we use after imaging the macs sometimes to put the work back on them) it finds all these backups and there is no way to distiguish which is which in the migration assistant interface.

This can't be right?
Screen-shot-2012-03-23-at-09.27..png
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PeteAsked:
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maximus5328Connect With a Mentor Commented:
Since 10.6.3, Time Machine will verify backups and if a problem is found will prompt you to start a new one. The sparsebundle will be renamed to the date of verification failure and locked.
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maximus5328Commented:
Not sure what you are asking here.
You can delete the locked files but have to unlock it first: Get Info > Locked.
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PeteAuthor Commented:
OK, so why do you think they are there? It is strange that when migration assistant runs (which we use after imaging the macs sometimes to put the work back on them) it finds all these backups and there is no way to distiguish which is which in the migration assistant interface.
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