As best I can tell, Mangadex has an extremely picky habit of refusing under any circumstances to use series hosted from certain websites, and refuses to host TLs from specific groups.
In some cases to avoid the ex-fellow "sharers" turned publishers (who now like to act like big boys who will make angry letters threatening lawsuits) who will then officially pick up a lot of series they will not have them hosted here. Other times its a selective exclusion of one MTL group vs another.
Mangakalot has all 62 chapters.... and they're entirely fine. No glaring TL issues at all.