Devices in incorrect folder

Hi there,

We are running ZCM 11.2 with a SQL database. I have created a specific folder with an associated registration key which places the workstation in this folder upon registration.
The registration key also has an associated workstation group so the devices are placed in the group as well as the folder.

Testing a automated workstation build and a scrip does the registration using the key. The machines are named correctly and are placed in
the folder and group correctly.

There are however other machines ending up in this folder as well that have not been built the same way.
Is there anything that could be causing devices to end up here.

It's not the first time I have seen this and machine have also ended up in the root folder when they should be somewhere else ?

Any ideas on how to track what is going on here ??

Thanks