To protect your privacy and increase the security of your account, Cubits generates individual addresses for each transaction you make. The amount shown in your Cubits Wallet is the sum total of the amounts held at all of your different addresses. Services like blockchain.info only show the amount associated with a single address, meaning the balances associated with your other addresses do not appear there. As a hosted wallet, Cubits uses your addresses for payouts to other customers, meaning that balances from blockchain explorers will differ from your balance in Cubits Wallet.