Supernatural Amazon US Boxset: all episodes in one file?

[GlacierIsland]

I put Season 1 Disc 1 (Episodes 1 through 6) into my LibreDrive-Flashed BU40N, first opening it in MakeMKV. Upon seeing only 4 individual episodes in the list and 2 "play all" playlists (One for Japanese, One for English, and the rest of the languages), I tried opening it with the PowerDVD and Process Monitor method. According to ProcMon and the seeking bar in PowerDVD, clicking on "play episode x" just opens the "play all" playlist and auto-sets the timestamp to when that episode starts. So do I have to copy/rip the "play all" English playlist and manually cut it into separate mkv files for the individual episodes?