When you import multiple motion/vote objects created on one indexed agenda item in LiveManager back into Legistar, Legistar will create a history line for each instance of the motion/vote entered in MediaManager on import.
Resolution
All notes created in LiveManager will import back as one note onto the first history line (recorded agenda item) in Legistar by design.
Note: Motions on motions, amendments, etc. can be handled as long as you are creating them under one time stamped instance of an agenda item.