According to the TV Bible, anime data on here should follow the original Japanese data, so if episode numbers are continuous then they are listed as one season. However for Re:Zero, the second season was produced and marketed separately as far as I know, and other anime-relared sites separate the first 25 episodes and the second (and even part 1 and 2 within that second season). So why is it one 50 episode season in TMDB?