I have done the steps as you said. It paid 70+1 coins in separate transactions as license fee and the test application is unlocked automatically. It is working fine. But why there are two 70+1 transactions and the balance remains at 228 coins in the wallet?

You need to add the details of the transaction. Attach a message or label the transaction as license to the app.

It would be better if you indicate the outgoing transaction in different color with - symbol rather than the +.