Shot some camera tests for an upcoming project and post for the first time has requested rushes in an avid format. Using a CF Weapon I selected DNxHD HQ as a second codec along with the R3D files. Earlier recordings with R3D record only selected the audio from the camera mic was all OK but after switching to the dual record mode the audio on the R3D disappeared when viewing both in RCX 41 and FCPX but was recorded and audible onto the DNxHD file. I checked the manual and I realised I did not do the recommended secure format of the media. Could this be the problem or is this to be expected?

Secondly is there any advantage in using DNxHR HQ over DNxHD HQ assuming both are 1920x1080? Avid confuses me.