Hi Ed,

re:
> Sometimes fillet needs multiple faces to be selected. I suspect it has to do with the smaller angle.

When you target only some edges coming out from a shared vertex location instead of all edges it's a much more difficult calculation for the filleter to do because it has to extend and intersect fillet surfaces against each other rather than being able to have the fillets come to a corner junction patch which doesn't need intersections.

- Michael