SOLVED: Season Dissapeared after giving sort title

[JackyHe398]

I have renamed the sorted title of one of the Season(I named it "OAD") to "Season 01.5". After I refresh metadata, the Season just dissapeared. I also renamed the sorted title of "柯里烏斯之夢"(Visions of Coleuso) to "Season 02.5", but no impact to it. 

here is the Photos and file structures.

user@truenas:/mnt/Pool1/media/anime/關於我轉生變成史萊姆這檔事$ ls
OAD  'Season 01'  'Season 02'  'Season 03'  柯里烏斯之夢
user@truenas:/mnt/Pool1/media/anime/關於我轉生變成史萊姆這檔事$ cd OAD
user@truenas:/mnt/Pool1/media/anime/關於我轉生變成史萊姆這檔事/OAD$ ls -all
total 6765712
drwxr-x---+ 4  user  user        10 Feb 27 01:19 .
drwxr-x---+ 7  user  user          7 Feb 27 02:16 ..
-rw-rw----+ 1  user  user 1323965965 Feb 26 22:04 S00E02.mkv
-rw-rw----+ 1  user  user 1451368851 Feb 26 22:04 S00E03.mkv
-rw-rw----+ 1  user  user 1376148823 Feb 26 22:04 S00E04.mkv
-rw-rw----+ 1  user  user 1367695210 Feb 26 22:04 S00E05.mkv
-rw-rw----+ 1  user  user 1408497193 Feb 26 22:04 S00E06.mkv
drwxr-x---+ 2  user  user        10 Feb 27 01:55 SPs
drwxr-x---+ 2  user  user        13 Feb 27 01:55 Subtitle
-rw-rw----+ 1  user  user        69 Feb 26 22:11 fansub.txt
Another weird points is, when i named both of them to  '"Season 01.5"' and  '"Season 02.5"' (with double quote), it correctly goes to the very beginning of the season table. After i remove the double quote, the problems appear. Is it possible for me to rename the sort title from command line to bring it back?