This is nothing but left-wing scare tactics and misleading propaganda with the clear agenda of painting Mitt Romney as anti-gay. Neither of these contributions concern me. Sure, you can look at them as "anti-gay", but if you dig a little deeper and bother looking at the whole picture, it isn't really it's sole focus. Of course, people here will, as usual, make it ALL ABOUT THE GAY, but that's not really telling the whole story.
The Massachusetts Family Institute is dedicated to strengthening the family and affirming the Judeo-Christian values upon which it is based. Like it or not, this is far more "pro-family" than "anti-gay".
The other contribution for The Becket Fund for Religious Liberty which is a non-profit, public-interest legal and educational institute that protects the free expression of all faiths. The are basically a law firm that protects religious freedoms, not necessarily an "anti-gay" group.