Hello Steven,
This could be because of hdbuserstore.
Run "Configure HDB User Store for SAP Host Agent" step.
Check below screen mentioned in the wiki. Can you see more than 2 associations?
"You can find HANA in the SLD of Solution Manager under Administration -> Content Maintenance -> HANA Database System:
...screenshot in wiki...
Make sure that your HANA Database System has more than just 2 associations. 2 associations indicate that this HANA system was reported by the RZ70 SLD data supplier and is incomplete.
"
If there is only two delete HANA associations from SLD and try registering HANA from hdblcm from beginnig.
Regards,
Yuksel AKCINAR