Simple answer: It is most probable that Cloudmining.website paid too little of a fee.
So, why blockchain.info has removed it and why others have kept it ? Will it ever get confirmed ? If yes, when ?
Blockchain.info is not ultimate source of information about transactions. I have seen some errors on this site in the past, they are not that uncommon.
Recently there were huge upror because blockchain.info incorectly showed that Satoshi's coins has been moved. For now just wait.