I think maybe everything has been sorted in order as it was added to the scanner...when I'm trying to configure a user defined parameter, I click the ? to the right of function to see the list to find the PID.XXXX that I need to include in my equation, and they're out of order...there are large groups...each group seems to be in order...for example, it is hard to find PID.2126 as it's actually near the end of the list.