dct:type on dct:LicenseDocument seem intended to capture many licensing aspects: permissions and duties like "royalties required" (which ODRL has a very complex model for) as well as types of licenses (e.g. public domain, for which ODRS uses a subclass of LicenseDocument). And dct:type on dct:LicenseDocument could be expected to about about something quite different, i.e. the "type of a document".
This issues ahs been reported by Antoine Isaac:
Issue is related to: