As I'm sure most are aware and a couple noted, there are two different ways to view this.
1. More 'liberal' based on accepting or promoting behaviors that we disagree with.
2. More 'liberal' in the classical liberal sense which is that governemnt has no place involving itself in the matter.
One can answer many of these questions/issues with #2 in that they don't think it is the government's role to be involved in or policing said matters (either at all or to the extent of extreme federal involvement versus state/local issue) and they stil will be assumed to be in category #1 listed above.
Believing government has no role in someting or shouldn't be policing something does not equate to agreeing or personally accepting something.
I bet most here, if the quesion were phrased a certain way, would fall into the #2 camp above for most of these issues, but still be classified as 'liberal' by the poll.