Anyways, isn't catsup a different thing from ketchup? Isn't it supposed to be more runny or something?
"Catsup" is just a different way to pronounce "ketchup" (generally used in the South). "Ketchup" is actually a pretty modern version since most people used to use the word "catchup." However, earlier versions of ketchup did used to have a thinner consistency, similar to soy sauce.