Hmmm...there still seems to be some inconsistencies. I am not sure if they are copy/paste errors but...
VM_BACKUP_VOLUME= -g /vmfs/volumes/DataStore2/backups
There should be no "-g" in the path
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In the log you have the destination datastore listed as
2013-01-25 00:25:08 -- debug: DST_DATASTORE: mini-local-datastore-2
But then you say that the second datastore is called "DataStore2"?
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VM_BACKUP_VOLUME= -g /vmfs/volumes/507ad3ce-330ace48-8b91-50e54926850a/backups
There should be no "-g" there either
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Im thinking there is something wrong with the data store
There may well be something wrong with the datastore but you will not find out until you get the right paths/names configured