--chanmap argument not rearranging channels in ALAC m4a

[packrobottom]

I'm converting a 5.1 channel wav/flac file to ALAC .m4a
using refalac.exe -A --chanmap 2,3,1,4,5,6 puts center first
resulting .m4a file is still 5.1 (C L R Ls Rs LFE) instead of correct layout like the Flac 5.1 (L R C LFE Rls Rrs)