I've recently changed my WS import policy to import any new WS into a
new container.
On the ZEN server policies(General), WS Import, Platforms(General)
setting, I have added in a WS group to be added to all newly imported WS
(see attached), however, when the WS is imported, the WS is not a member
of the required group.

Any idea why this is happening?

I'm running ZEN 6.5 Sp1 on NetWare 6.0 Sp4