Agents being anything other than agents at the same time has a tendancy to be a conflict of interest. It often means that the agent can't support themselves as an agent and uses other means (usually in some sort of paid services). That's not the kind of agent you want. If this agency is taking payment for editing, that's a red flag. If they're referring to editors as in that they help brush up their clients' work for submission, which I don't believe is too uncommon amongst legit agents, then it's just a confusing thing to state on their website.
Either way, it would be nice to have some clarification from the agency itself.
I don't think they're selling editing services; rather, you can hire them to coordinate a conference or retreat; or you can hire their conference centre venue.
However, the bio for the two literary agents states only that they have authored various books. There is nothing about their client list or sales to publishers, which suggests that they have no experience or track record as literary agents. They look like they know what they're doing in terms of spiritual retreats and conventions, but I doubt they've got the necessary links in the publishing industry to pitch and sell books to editors.