In the latest update we've changed the way cards are displayed.
If you buy more than 2 cards, a green arrow button is shown.
Pressing it will lead you to your other cards.
However, sometimes this button won't show up.
This is a known issue and we are working on a fix.
The fix should be released now! Check for updates manually in Store.
If you do not see this button, please contact us and provide your Player ID!