Asajj inconsistency

"Kyno;c-1563349" wrote:
being an agent for a police force doesn't mean you are a cop.

so it doesn't really seem like a contradiction, she was an agent of the sith and not a sith.

Then why is Ahsoka Fulcrum a rebel? She is also "just" an agent employed by the rebel alliance.

If someone speaks like a sith, looks like a sith, was trained by a sith, acts like a sith, considers herself to be a sith and slaughters jedi like a sith, what is it?

She is the apprantice of a sith apprantice.
Like your (hypothetical) grandson is the son of your son. You are still one family.