ZBrushCentral

Why might Zremesher's Same or Double settings not be working with symmetry off?

I am using Zremesher to retopologize modesl around 800K polys.
the models have one subdivision level and was created with symmetry on.

I have noticed but dont understand why, when I use zremesher with symmetry on and I have
the Same button on , I get a remeshed model close to the original poly count.

However if I remesh with symmetry off The polygon count is always much lower (arround 150K polys) no matter if
I have Same or Double button on. Also reguardless of the adapt settings.

Can some one please explain this to me?

At times I want to use Zremesher with symmetry off because, I have added some detail at the symmetry line with symmetry turned off, and this detail may not be exactly centered, and I have found when I then use zremesher with symetry on it will slightly distort this detail by trying to symmertricalize it. But as mentioned when I turn sym. off my poly count goes way down after a Zremesh. I guess I could use the project function to recoup lost detail, dont have much experience with that yet, and would like to avoid extra steps if possible.

So I am trying to understand why the different behavior of Zremesher with sym. On or Off as to poly count output difference

Thanks