For example, a constitutional ban on gay marriage is liberal as it sees moral issues as being something that should be dictated to the states instead of being dictated by the states.
The myth that being socially conservative is somehow also politically conservative is exactly how the neo-cons got ahold of the party.
One can be a social conservative as well as being politically conservative, just as one can be socially liberal while still remaining politically conservative.
The two things are not connected.
I get called a liberal, even though I'm anti-federalist, which is very politically conservative, simply because I have no issue with my state allowing abortion or allowing gay marriage and such.
I'll argue philosophically on the reasons in favor of these issues, but I would never argue for a national standard regarding these issues because of the 9th and 10th amendments.
For example, I'm against Roe v Wade, but not because I disagree with abortion (i.e. NOT because I disagree with the right it grants), but instead because I disagree with the rights it REMOVES (i.e. the rights of the states to decide the issue). Even though I personally am in favor of abortion rights in my state, I do not think the methodology of grranting those rights in my state are appropriate. It should be solely within the realm of the state to decide.
This view puts me firmly on the side of conservativism, not liberalism. Although the lines have been blurred to the point where I get labelled incorrectly more often than not.
Bush has never shown me that he is anything but a liberal in nature.