Very good you have found this first of all. There are always some bugs in apps, and we try to fix them constantly. Some bugs can though be fixed with one of these:

Force the app to close (iOS):

  1. Press the Home button two times quickly. You'll see small previews of your recently used apps.
  2. Swipe left to find the app you want to close.
  3. Swipe up on the app's preview to close it.

Refresh the app screens:

In each app screen if you press the screen and pull downwards a "roller" appears at the top of the screen, rolls for a moment while it gets new content for that view and then updates the screen. 

Check the 3G / wifi connection:

Sometimes weak wifi / 3G connection makes apps act out. Check your connection! 

If none of these work, we'd love for you to send our support a message so we can fix it!