RED 8k RDM and RDC folders in Media Browser

I am editing a feature that was shot in 8k on the RED Weapon. When bringing the media into the Media Browser, some days it shows up as a series of RDC folders without an RDM folder. On those days, when queued to import, ALL the segments of each R3D file show up ready to import, 001, 002, 003, 004... or whatever depending on length of the shot (each 4gb), when this happens, there is NO RED icon next to the segments, (in list view). If I queue the media from the RDM folders, only the 001 segment shows up from each shot, and the IS a RED icon next to each one. My real question and concern is why, what does the icon represent, and when I import the individual 001 segments from the RDC folders into the project window, am I getting all the data/information from that shot? Side note, but related, if I import all the segments from the RDC folder, (001,002,003...) it will create a file in the project window for each one. So, they are behaving like individual files. Are they all identical, but just with different file designations?