Are you using the blockchain.info mobile device wallet (if so is it iOS or Android)?
Are you using the blockchain.info website wallet?
Are you using the blockchain.info Chrome App?
It appears that, whichever you are using, either you are misunderstanding how to use it properly, or it has a bug. If it has a bug, then it would be good to identify which method you are using to access the wallet so that blockchain.info can be notified about the problem.