OK. Thanks, so I am going to divide and put the matted cap of one piece on top of the media. Then I am going to put media on top of the matter roots of the other piece and whichever one does best, we will see. Let them compete. The media comprises of bark, charcoal, aliflor and perlite.
I think Dr Dawg is correct. Those matted roots that were just sitting on top were just using the dead ones below as media, which I find strange. In that case it seems that we really don't have to worry much about repotting since these roots will just make a house for themselves and make do with what they have. The roots in the wild probably just rot away and new ones just grow somewhere else.
Thanks everyone.