My original suggestion was in terms of organizing where on the table each category went, using bold for the main categories. It didn't mean to propose to mix the demos of similar categories in one box.
Intermixing the sub-categories was my suggestion to solve the problem of, say, Pacifist demos being faster than UV Speed. Reordering the categories is doable, though I think bold-ing the 'main' categories would help much. If we really need to further 'separate' the categories, different color backgrounds(for each) would be the most effective solution. I imagine that would end up looking ugly, though. However, that won't fix the issue above, which is what this conversation has got me considering.
Have you given any thought to what I said about PrBoom compatibility?
Yes, but I haven't started doing it yet because I don't like the idea of them not ALL having that info. You have to understand, if I were to begin adding the complevel(say, with a 'cl#' or '-cl#') it would only be to demos posted from this point on. There are currently over 4,200 PRBoom demos in the archive, and adding a complevel to all of them(let alone determining said complevel) suggests a level of tedium I haven't experienced since transfering the records from the old DSDA. Back then, with a solid, worthy goal in my sights, it was worth it and I could manage. Today, with the site up and running smoothly, and a goal that, even if I thought it mattered, would be a slight improvement at best, I can barely muster the will to discuss it.
Consider: I have a goal of entering all the TNT and Plutonia demos from the Compet-N into the database. I began nearly a year ago, yet only a fraction of it is completed. That's something I want to do.