7
someone once told me that the first thing you should do if you want to start re-naming/changing blocks is to create a cloned set and work on them, that way the default blocks are always available should the cloned ones get messed up... sorry, that's not much help now, is it?
how about trying to clone a set now and see if the cloned block shows up...
Never let a man who does not believe something can be done, talk to a man that is doing it.