09-15-2015, 05:33 AM
Either a bug or someone in your party changed you to a monster you had 1 card 
Also, you get 1 ~ (x+1) cards per drop. But yes, with event + double card drop, you should always get a multiple of 4.
Also, you get 1 ~ (x+1) cards per drop. But yes, with event + double card drop, you should always get a multiple of 4.