Retopology Issues

After cleaning up the mesh, I am now ready for retopology.

At first I tried ZRemeshing the scanned head to create clean topology, although the Zbrush doesn't quite get the desired result, missing concentric edgeloops around the mouth and eyes.

Then I tried using a base mesh with correct topology to project the details of the scan onto it

Unfortunately, this did not go as planned, and the mesh went absolutely haywire..

Not sure why this happened, but either I manually retopologize the head myself which could take a couple days, or I find another program that can do it better!