Personally I'm leaning in the direction Zaeed was in his phone call with Boba about the "who" and "why" questions. That being that protecting Kaname might just be his task for now. I wonder if Techcomm isn't being hired by some rather more nefarious group. The Corps, or even Ohtori. Could be Sagara's mostly meant to keep her safe but also in close reach. Not that he's aware of it of course.