because blockchain.info (service, not the actual bitcoin blockchain) absolutely sucks. Their code and service is just bad, and sorely needs to be fixed. Don't bother trying to use them for now, use other explorers and apis like blocktrail, blockr, blockcypher, or one of the tens of other explorers and apis.
Yes, I swear to God, I feel like I parrot, I have repeated this 20 times in the last 10 days.
People, ditch the blockchain.info, both wallet and block explorer. They suck, they are buggy as hell. Even Bitcoin.org has removed them from their list of official wallets. This means something!