The mkv source is from me. i recorded on TBS in the early 2000’s. It was broadcast in mono, but i didnt realize that the encode i did moved the mono sound to one channel. Nothing is absent in the sound you are hearing, its just all moved to one channel.
Correct. I watched both TV sources (Echo3’s and the BD extra). Both version feature the same cut. Quality between the two are very similar. The biggest difference is the BD extra does not have the TBS logo.