There are several settings that you are able to change which can alter the way the game works.
What status should duplicates be set to
Here you can select what status your duplicate cards will default to
Show missing cards when viewing cards page (doesn't affect collecting)
If this is set to no, the page will only display the cards the user has, if it is set to yes then it will show blank cards for missing ones
Would you like a daily email reminder to login for the login bonus
This will give you a reminder email each day to login and get the login bonus