To say that there's compatability between Scheme and CL, and no compatability with Racket is ridiculus: Racket has Scheme compatability modes.
As for the language being called Lisp if it's Lisp, two of the examples you list in the "non lisp" category do so: Clojure's website claims it is a "dialect of lisp," and AIM-349 describes scheme as "essentially a full-funarg LISP."
As make no mistake, all of these languages, from Common Lisp to Clojure to Scheme, are dialects. They have the same origins, and they share many of the same ideas.