Every time I post the leaderboard I do a small amount of manual processing so that the file is ready to present to the community. Basically, I remove accounts that we only use internally and don't have any meaning to the community as a whole. If this user wanted me to combine his multiple accounts, I would add this into my manual processing routine.
Ben - an AE started over from scratch for this leaderboard because the backup files we pull the data from are very different from the way the leaderboard was originally written. I could ask the AE (JamesC) to add this functionality into his code but it doesn't seem worth it for only one user that has not requested this to happen. Plus, he is working on the ability to provide additional stats in that leaderboard, and to make it run faster, which is something I would rather have him working on.
About the comma delimited file - the file our program generates is excel which I convert to csv to post so that people without excel can open it. I can start saving this into a tab delimited file instead. I'll start doing this on Monday.
Thanks for the interest! I'll be sure to pass this thread along to James so that he knows his work is useful to the community.