“More House Republicans in the new, 114th Congress identify as Catholic than in any other recent Congress, and they now outnumber Catholic Democrats in the House, according to a new Pew Research Center analysis.”
http://www.pewresearch.org/fact-tank/2015/01/22/house-catholics-are-trending-republican/
You are correct, I was looking at their graph and this “the share of GOP members who identify as Catholic also has grown from the 111th Congress (21%) to the 114th (28%). Meanwhile, the percentage of Catholics among House Democrats has dropped slightly, from 38% to 36%, over that same time period.”
Either way, it isn’t a very meaningful statistic, at least to conservatives.