All Mangas Reader

I simulated the situation on a new chrome profile, here are the results..

{"mangas":"[{\"mirror\": \"Manga Reader\", \"name\": \"Fairy Tail\", \"url\": \"http://www.mangareader.net/135/fairy-tail.html\", \"lastChapterReadURL\": \"http://www.mangareader.net/fairy-tail/235\", \"lastChapterReadName\": \"235\", \"read\": 0, \"display\": 0, \"cats\": \"[]\"}, {\"mirror\": \"SomeManga\", \"name\": \"Fairy Tail\", \"url\": \"http://somemangas.com/manga/Fairy_Tail/\", \"lastChapterReadURL\": \"http://somemanga.com/manga/Fairy_Tail/235/\", \"lastChapterReadName\": \"235\", \"read\": 0, \"display\": 0, \"cats\": \"[]\"}, {\"mirror\": \"Manga Reader\", \"name\": \"One Piece\", \"url\": \"http://www.mangareader.net/103/one-piece.html\", \"lastChapterReadURL\": \"http://www.mangareader.net/103-2042-1/one-piece/chapter-2.html\", \"lastChapterReadName\": \"2\", \"read\": 0, \"display\": 0, \"cats\": \"[]\"}]"}

Hope it helps.

I imported your manga list and all seems to be OK...
There is just a manga on Somemanga which won't be accessible because SomeManga has been removed from supported sites list.
I didn't mention it in the help page but mirrors which have been removed from supported websites list are replace by a blue question mark. AMR won't be able to find list of chapter because it does not know this mirror.

Dunno, tried anew with completely uninstaling extension and sync file, imported the list and it only shows One Piece, while the number on the extension icon is 2... Maybe it's because of Chrome Dev?

Ok found it... try to display your list in "List Mode" --> in Options Page > All Mangas Reader > Check "Display mangas in a list so i can see many of them"
You will see your 3 mangas (two fairy tail and 1 one piece)
I noted the bug on my TODO list