Manually Entered Agent Reverting to Agent in Real Geeks:
This behavior is due to the fact that we are integrating a Real Geeks Contact (person) with a Transaction (event) in Sisu; the two are incongruous.
These are the limitations of each system, rather than a limit or bug in the Integration. The only workaround for these limitations is to create two Leads in Real Geeks: one Buyer and one Seller assigned to their respective Agents.