I'm not sure what it means (I have a cluster with the same thing) and have been meaning to open a TAC case to find out but it's somewhere near the bottom of my priority list. The critical field on this report is 'All servers have a good replication status.' Each node should have a replication status of two (2).
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...