When you look at a progress report for a den/patrol/section/troop and you pick "All *s", the progress report was showing every requirement of every award. This was making the report really slow and totally useless. I knew about this last night when I was working on progress reports, but perhaps I was tired because I couldn't make sense of it.
This morning I woke up with the answer in my head, and as a result the progress report by achievement type now only shows a summary view of every award of that type.
Have a great day,