Telus tv 21T andriod box

Hello, 

I am experiencing problems with getting 5.1 surround sound out of the new Telus 21T android box. 

I have confirmed that the problem is with the output of the Telus box it self. 

I am running 2 of these boxes in the system, box #2 is producing audio at the correct volume but box #1 is coming in at about 50% of the other box. 

Any suggestions or settings to fix this?