I think that this issue was caused by the 2.0.5 update, I noticed this when I was trying to make sewers and public baths appear on the battle map in eastern cities. Instead of building slots being filled by culturally appropriate tenement buildings, they are instead filled by this weird building that resembles a roman trader. Has anyone else experienced this issue or knows what I might be able to do to fix it? This also is happening in Barbarian Invasion.