Nice app for kids, but... – Alphabet Train For Kids - Learn ABCD Review

My 21 month old son is obsessed with trains right now so I decided to get this app and buy all the letters for $1.99. I was in a pinch so I installed it on my iPad and he loved it. When we got home, I put the app on our other iPad (the one we put all the kid stuff on) but the letters pack I bought didn't carry over. So the kid iPad only has 5 letters even though I paid for the entire pack. I tried emailing the developer for support and got no response. Lame.
Review by skimshakey on Alphabet Train For Kids - Learn ABCD.