Mouretsu Pirates at ANN (Satelight):

Director: Tatsuo Sato
Series Composition: Tatsuo Sato
Chief Animation Director: Hiroshi Takeuchi
Original creator: Yuichi Sasamoto

Rinne no Lagrange at ANN (Xebec):

Chief Director: Tatsuo Sato
Director: Toshimasa Suzuki
Series Composition: Shoutarou Suga

Looks like he's merely adding a magic Tatsuo Sato touch to the Lagrange while actually running the production of Mouretsu. Still, this seems unusual.