5.1 surround bounce channel order

Hi, I work on movie music in surround, 5.1.

When I 'export audio to movie' (or when I Bounce), regardless of which settings I choose, I always get a video file with the 6 tracks in the wrong order.

In fact I get the SMPTE/ITU (L, R, C, etc...) order. But I need the Film order (L, C, R, etc...).

I tried changing the Settings - Audio - I/O Assignment, but no changes in the result. I also tried Settings - View - Channel order but again no changes at all.

Any advice is welcome,

R