Reporting a similar issue on "Babylon 5" (remastered), which has recently appeared on the Roku Channel. The episode list is "off" by one episode, such that Ep. 1 is not listed and "Ep. 2" in the list actually launches the media file for Ep. 1. I have not checked everything, but the beginning of the series, probably all of Season 1 or more, is incorrect. Happily, this show prints its episode titles on-screen just after the intro, so spot-checking should be easy. See images below.
Season 1 Ep. 1 missingEp. 2 mislabeled as Ep. 3.