Exporting non-Interleaved audio

Hi,

I was trying to export a video in ProRes422(HQ) .mov for a client (Broadcast Company).

At first I wrap the audio like this (one 5.1 and two stereo streams here):

But then he said he want the audio in non-interleaved format,

Then I export in this way (every audio tracks in mono):

But I still fail to meet his expectation.

I was wondering am I having some basic misunderstanding with the concept of "interleaved audio".
Can somebody help me out I'll really appreciate it thanks 😄