They probably are, but they decided to make it over in a new engine. Since they have to port the gameplay mechanics over anyways, why not release a remastered version of the original to help fund development of the next one.

It’s starchy chunks in a dairy based broth, so chowder.

Could be rust or some minerals that ended up on the bottom. Try boiling a mix of vinegar and water and see if it wipes off after. I’d keep using it anyways though, nothing to worry about.