I think this is another reason why marriage equality is so important. Gay relationships -- even between domestic partners -- are still not seen as equal to straight relationships, and they must be.
It's a horrible situation that same-sex couples must remain separated because they are not seen as viable partners. Immigration reform, along with marriage equality, should be at the top of the gay political agenda.
Hopefully those couples who are now separated can someday in the not-too-far future live proud lives together.
More on this issue and what you can do in a future post.