No there are 4 PARTS to the first season, it is unknown if there will be a saat season, its been berkata they might be making a saat season and its gonna be like the manga.
Maybe...the Manga is different from the anime. In the manga, the kishin was not yet found unlike in the anime. I wish it would be like Full Metal Alchemist and FMA brothethood. Both Anime were different. In Soul Eater, I don't know. I hope they would still continue it because the Manga is so awesome.