As explained here and here, these episodes weren't broadcasted during the original run of the series on FujiTV, but only streamed online. Consequently, they should be listed as special episodes.

@superboy97 said:

As explained here and here, these episodes weren't broadcasted during the original run of the series on FujiTV, but only streamed online. Consequently, they should be listed as special episodes.

who minds that broadcasting issue when it's clear that they belong to that season in that particular order 19,and 20 from 22. i love and respect your work as database, but at the same time frustrated and tired with your inflexibility about this kind of issues which, in the end, mess us, the viewers and media centers enjoyment... you TMDB have a key to put some order in our messy world&heads but decide to follow some rule written on stone and fk everybody...

If you want them in the intended order, you can use this episode group.