Backup Exec 2010 - backup to disk

Hello,

I am using Backup exec 2010 on SBS 2008. It is backing up to tape fine. I have configured a secondary backup to NAS.

It is running a full Friday backup  to \\nas\share\full\

And during the week it is running  incremental backups to \\nas\\share\incremental

Recently it starts storing the data to the root folder of the NAS  \\nas\share in folders with names like this: 201410103000

and it is not overwriting the backups.

How can I fix that, so  the full and incremental backups to go to their folders.

Thank you,