On the Terminologies page (http://build.fhir.org/terminologies-systems.html) under the Code Systems tab and then the Defined as part of FHIR subtab, the second and third column headers are wrong. 

The second column header should be labelled as 'Title' (instead of Description) and the third column header should be labelled 'Description' (instead of OID). 

This is correct in R4B (https://www.hl7.org/fhir/terminologies-systems.html) but not R5