I could say that Springfield is its own eldritch abomination, possibly brought about by the hot mess of the timeline here. It's a dumping ground for all of the weird/non canon stuff so that the world doesn't explode, and as as result, it both exists and doesn't exist. It has to exist because all of those things do exist, but it cannot exist, for those very things would tear reality asunder. Add in some non Euclidean geometry, weird colors, and (Sideshow) Bob's your uncle.
Wonder if Cecil has a radio show there.
Huh, found an easter egg.