TMDB's rules prioritize the aired order. That means:

• Disaster Response Robots, which NHK WORLD has labeled as "#18", is actually episode 17 on TMDB.
• Human Stampede, labelled as "#17" by NHK WORLD, is actually episode 18 here as it was air over 2 weeks later than the above episode.

There's an episode group which uses the production/intended order by NHK WORLD.

Note that much of the episode data differs (air date, episode images, director and production code), so if anyone feels the order should be according to NHK's labeling, then shift the episodes (as in change the episode number).