I never got a notification of this message on the forums, so sorry I haven't chimed in sooner.
The log was written over two years ago, and was designed to pull from the database based upon those that were at your level but were also the most recent to update their log, basically making sure it was FRESH users to compare against.
I haven't touched it at all since it was built, and I doubt Kevin has either. If ad placement has changed, that's all Kevin's side, as I don't have direct access to any of Simplefit, all changes and code was sent to Kevin back in the day for updating.
To be honest, I haven't looked over the code in a long time. If this is still having an issue, let me know and I'll dig back in and see what I can figure out. Send me a private message also with a screenshot of your charts and overall log to give me something to reference. No promises, but I'll see what I can do (I was a very young coder when I wrote this log, so it could have flaws).