I have used two similar cheap headset microphones and both had the exact same problem. You can sing scales and the program identifies each note? I am singing a note at a time, holding the note till I figure out if I am in tune or not (kind of memorized the harmonic series in order to do that). When ...

I have tried different settings in the microphone volume range but the notes displayed still are a mix between the notes that I sing and higher harmonics of those notes.

When I sing, the notes displayed always jump around, regardless of the setting on the microphone tuning wizard (It happens set as even and odd harmonics, even harmonics or odd harmonics).

How does this selection of harmonics work?
What can I do to solve this?

Thanks