Monitor multiple interfaces on one router

Hi,
I have set up my router with the ip route-cache flow on both interfaces i want to monitor, on version 5.5.0, build 5505
when i add the ip flow-export source (interface) it will only show the the last entered interface, it will not allow me to have both G0/0 and G0/1.
So subsequently i only receive the data from one interface at a time, until i go back and manually change the configuration on the router, definitely not he optimal solution.

i have tried entering a secondary destination by adding a second receiving port, but to no avail.
i have followed the sample device configuration, please advise where i have gone wrong.