The first thing that is confusing about the karimba is that people assume its name is a misspelling of "kalimba." When I say "karimba," I am referring to the traditional instrument that Andrew Tracey described as the "original mbira" from 1300 years ago. The name "karimba" can also refer to one of the new tunings we have derived from this ancient instrument.
It certainly can be confusing: does this instrument have 8 notes, 9 notes, 13, 15, or 17 notes? Yes to all! What key is it tuned to? Great question! Let's not view these issues as problems, rather let us see them as opportunities.