TM1 looking first at the backup IP address

I want to understand why the backup IP address seemed to be interpreted by TM1 as the primary. Why was the primary IP address which was valid not picked up first? Is this something that is ordinary for TM1 to do or would there be a reason why as a result of the servers configuration that the backup IP address be used rather than the primary? Is there a special configuration required by TM1?

blitz92