Using default settings, I figured Id change the filter but it doesnt seem to save.

I am also seeing this

I think I figured out what's going on. There is a "BM" string in the german search pattern for Ramparts. Whether this is correct or not for german language I do not know. But the solution is to go to the settings to the "Search patterns" section and tick off usage of german (and any other) patterns you are not interested in.

Additionally, fully typing out "Black Morass" lists the post as being for the Black Temple raid.

What "the-chuppa" said. Please turn off other languages, this is intended behavior