This is to let delegators know that I am aware of the double payment issue, I have much more data than when it happened weeks ago.
Unfortunately, it is not an easily solvable issue for me, as it is related to JS code not behaving as expected. (It returns different values for the same variable in the same iteration.)
I will try some measures I can think of for now and try to research the issue some more. I will issue payments from 
