What about that is inconsistent with it being a new strain of ebola? It's not a new disease. It shares a common ancestor with Central African strains of ebola, but it is a new strain.
The initial assessment from March/April has since been panned by geneticists. It’s considered a strain of Zebola.
It has sequence similarity closest to the Zaire lineage using a vareity of heuristics.
I’ve seen no references to Ebola Guinea in any publications.