Thanks Jousef,
let me reiterate.
I am not talking about from the first state to the last state.
these sims are all finished. when you start the solutions fields, there is already a particle trace ready to go (click on links to the projects).
As the particle trace is loading, it presents one image (the expected image), and then at 99% loaded, it then changes to a different image.
I trust the first image more.