Thread:Extension talk:User Merge and Delete/Bug? User Creation log show duplicate users after merge

I'm trying to use this extension to delete some of the hundreds of spammer accounts accumulating on our wiki. But after trying it out I noticed a bug. I've created a user called "spammer" and I've delete/merged a number of spammer accounts into the user spammer. When I view the creation log now, it's full of many duplicate entries for the user spammer. It appears that the utility is not properly purging entries from the creation log (just a guess). But if I continue using it, I'll have a hard time finding the real users in the creation log for all the hundreds of duplicates that will be there. Any suggestions?