The Rhyhorn bug: So I made the OP Rhyhorn generator and it seems not to be working, someone told me it was range but it wasn't, I looked at its range, and the ores were in it "Fake:" spam bug: When I use the /msg (player) when I send too much messages I encounter a "fake" spam I don't have any proof but if needed I will get some
Rhyhorn can only make blocks spawned by geodude since the skyblock update. You may be looking at an old "op generator" that no longer works due to the changes.
For the other issue, if you are using 1.13, sometimes the server kicks you for spam when using /msg. It has been reported. For now I suggest not using 1.13.