The game is originally Japanese and Nutaku wasn't doing any work on it other than translating it to English, and thus it was 100% censored. I'm guessing they eventually hired an artist or 2 to make new cards like Silly Girl and also started having them go over existing cards to de-censor them.
However, because most of the content is still coming from the Japanese version of the game. Almost all newly added stuff is censored.