I was playing with this as I did not see these in our system, so I assumed it had to be something different than our normal work flow - but I was only able to create these in one manor (not sure it is the only way, just all I came up with in my testing)
Right Click on vApp
Select "Copy To"
The name field is empty - put in the name "VM Copy"
When the create is done a folder will exist with the format you are seeing.