Well... Different people use different terms in different ways, I guess. Personally... I would say that what is most likely to be going on here is that in the attempt to be as holistic as possible they are embracing redundancy. Don't even get me started on the distinction between mental / psychological and spiritual...

Perhaps they go on to define their terms or at least provide examples so that you can get some kind of handle on what it is that they are trying to talk about?