Here is a screenshot not to make you angry but to show you how to bug UCBench to run stupid high.
using -ri7 after the instruction set I would say 1 in 10 runs will be buggy like this
In the screenshot you will see its not there because I erased it before taking it.
I think the answer to this is to require a valid link for top 20 in each category.
The valid link will show the actual string you used in the command line.