No there are 4 PARTS to the first season, it is unknown if there will be a 秒 season, its been 発言しました they might be making a 秒 season and its gonna be like the manga.
Maybe...the マンガ 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 アニメ were different. In Soul Eater, I don't know. I hope they would still continue it because the マンガ is so awesome.