How to tell cause of mismatch


I have a Katello/Foreman server and a Capsule/Smart Proxy server in a different data center (read: location). As far as I can tell, all hosts are pointing to the respective server in their data center. However, the location with the Capsule/SP is telling me that the main Katello/TFM server is in use by a host (via editing the location and/or running a mismatch report).

Location/Organization	Mismatch Details
OM1 (Location) (SmartProxy) 

How can I determine which host is causing this mismatch? Is it the Capsule/Smart Proxy itself that causes this?