He still isn’t summoning the dead. The dead have come to him voluntarily. All he is doing is praying for them. So, no, that does not apply here.
With respect to your concern that he is just doing things without getting guidance or approval, we don’t know that he did not do so. If there’s one thing I have learned, articles aren’t always complete and accurate. He may have very well gotten approval.
My only question is setting up specific Masses for the main purpose of praying for souls that are disturbing an area. On any given Sunday, we may pray for the souls “in” purgatory as part of the Prayer of the Faithful, but I have never heard of saying Mass specifically for questionable souls that are not “in” purgatory at Mass.
That doesn’t mean it’s never been done nor that it is wrong to do so, but it is something that I would need to look into further. Unfortunately, in this day and age as I alluded to in another post, you can’t assume that every priest is acting in accordance with the Catholic Faith or following Catholic rubrics in the Mass.
“All he is doing is praying for them.”
No, he clearly communicates directly to them, in the article. He also is shown trying to divine their presence through his feelings, which certainly seems like he is seeking them out to communicate with them. Then, he’s holding a mass to communicate with them, so he is likely setting a specific time and place to make his communications with them. Essentially that is a seance, he is just calling it a “mass”.