Hello,

I have tried with these same attributes and it seems to sort in ascending order of sys_created_by.

If you want it by descending order then you might have to write a query Business Rule.

It is explained in detail in this thread - https://community.servicenow.com/community?id=community_question&sys_id=23bec761dbdcdbc01dcaf3231f9619bf

Business Rule would look something like

(function executeRule(current, previous /*null when async*/) {
	current.orderByDesc("sys_created_on");
})(current, previous);

Hope this helps!