That seems odd- as there is a ridiculous amount of metadata viewable in premiere.
Reading your note- I'm not familiar with the classification of metadata your recorder would use... But Codec, for sure is in there, as I use it.
Would your sound mixer be available to tell you what 'channel' the recorder stores the metadata in?
Not very helpful maybe, but I also find that the metadata window can be more useful than the 'metadata display' user options in the column layout of the project window
Good luck :/
Ugh- what a drag. Hate that time sucking crap.
So, in the interests of science, I'm assuming that the scene, comment etc columns have yielded nothing useful from the recorder metadata? I still think it would be useful to know the scheme of the recorder ie what it classifies certain data as.
I Wish I could be more helpful, but I barely scratch the surface of premieres metadata As I haven't really needed it all that much.