Since same-sex marriage is recognized by the federal government, why do some U.S. Senators' online contact forms discriminate, while others express equality??

In the United States of America same-sex marriage is recognized by the federal government. As Wikipedia tells it:

 On October 18, 2012, the Second Circuit Court of Appeals became the first court to hold sexual orientation to be a quasi-suspect classification and applied intermediate scrutiny to strike down Section 3 of DOMA as unconstitutional in Windsor v. United States.^[14] The U.S. Supreme Court ruled in Windsor on June 26, 2013, that Section 3 violated the Fifth Amendment.^[15][c] As a result of the Windsor decision, married same-sex couples—regardless of domicile—have federal tax benefits (including the ability to file joint federal income tax returns), military benefits, federal employment benefits, and immigration benefits.^{[16][17][18][19]} In February 2014, the Justice Department expanded federal recognition of same-sex marriages to include bankruptcies, prison visits, survivor benefits and refusing to testify against a spouse.

So, why then do the comment submission forms on United States senators' web sites discriminate against married gay people? Here, for example, is Louisiana Senator David Vitter's comment form:

 Do you see any acknowledgement of married same-sex couples?

Compare this with Vermont Senator Leahy's comment form:

And this is California Senator Boxer's form:

Not quite as all-inclusive as Senatory Leahy, but a good try!

Shouldn't all federal senator's have to acknowledge federal law and the decision of the U.S. Supreme Court? Check your senator's web site, and urge them to take action if they are discriminating against married same-sex couples!