Deletions are handled more like requests rather than hard deletes. There’s no way to guarantee that the deletion request goes through for a particular relay, so depending on your relay list it can still show up in other clients. 

 That's interesting. Thought the Mutiny Blastr relay would make sure that everyone is aware of the request but guess not.  

 It might make them aware of the request, but a relay doesn’t have to support it.