This just started happening when I grabbed 1.4.2-1.7.10: dungeon towers are now occasionally spawning within 1 chunk of each other, overlapping each others' dungeon. Not sure what's happening, but I've seen several of these in randomly generated worlds since yesterday and never before with the version of Roguelike on curseforge.

It can happen, it's just rare. I don't mind that it happens because it creates chaotic dungeons that are interesting in their own way. Conjoined dungeons are something you could consider a lucky find. I've personally never seen two dungeons spawn right next to eachother one chunk apart.

what seed? this is possible by the way. nothing special has change with regard to selecting spawn locations.

If it's possible, then no worries. Guess I've just been lucky and never seen it happen before.