Good find! Looks like a bug to me, although I think the Clone function is correct because it does (at least for me on the cloud version) create a new test case key and increment the ID. But I agree with you and wouldn't expect the change in version to affect the sort by ID. It certainly seems like there is an underlying sort that first uses the version number, and then the ID (if selected).
Can I suggest you raise this with the SmartBear support team. They might be able to help with your case.
Nice find!
I just had a quick look at the request ZS sends, when you hit the sort button for key. What happens is, that it sorts by the internal ID of the test case and not the key you see on the UI. When you create a new version, ZS creates a new test case object on the db with a new internal id. This then results in the behaviour you witnessed.
Definitely raise a support ticket with SmartBear, so they ca fix this.
Cheers
Josh
