Ditto. I'm pretty sure it's just one of their numerous religious "orders" (denominations.)
A denomination would have different theology or dogma - like the difference between the Southern Baptists and the National Baptist Convention, USA.
"Orders" are basically different groups of priests or nuns or monks or friars who follow a certain rule and discipline: for instance the Franciscans v/s the Norbertenes --> Franciscans are for guys who want to go out and preach, while Norbertenes are more contemplative.
I suppose the closest differentiation would be between different regiments in the military - different ways of doing the same thing, but with a common belief
Orders within the Church are not "denominations." They are a distinct manner of living out one's vocation within the Church. No one breaks with the Church by starting a new Order, let alone starting a whole new Church based on their personal theology, as is done in non-Catholic Christian circles.