First of all, I would use tsmuxerGUI to demux all of the tracks of interest into separate ones.

The tracks that are not working are very likely DTSHD ones. I don’t believe Premiere will accept those. You can convert the channels to wav/PCM using audacity, I believe. I don’t recall if that will give you lossless or just core audio. Then, you can import the individual channels into Premiere.

If you don’t care about lossless audio, and ac3 is fine for your purposes, you can just directly export a multi-track ac3 from audacity and use that in Premiere. It should be easy to work with in the editor that way.