There's a few other similar layouts across a few different boards if you just search for the chipset, so it might have been based off a template. All of the others are SIPP though. Here some of the pictures and the diagram is with discrete chips at least.
TheRetroWeb is a volunteer project, so sometime mistakes are made. The pictures of those boards with SIPP foorprints may well be from before the other similar boards were added to the database.