Exporting 5.1 surround mp4 - Metadata mismatch

This is has been around for a while, and now my client needs this fixed!

Exporting a timeline with 5.1 is genneraly easy for Premiere, but when I make a h264 file with 5.1 surround, the format always lists the file as (C L R Ls Rs LFE), not how I ALWAYS export my audio as LRCLfLsRs.

How can I make the metadata lists the audio config correctly?  Is this been a bug in Premiere/Encoder?

-Eric