Catherine, it is very simple to change your match answer. On your match inbox page you will see a search box at the top with a little down arrow next to a magnifying glass. Select that drow down menu and choose 'no.' All of your matches who you were not interested in will be displayed. Select the 'Change of Heart?' button and you will then be able to choose a different answer.
I will have to do a little research on a smoking and drinking question. I know we have excluded some items like that but I can't recall which ones for sure. As I mentioned in another post we are mostly basing the matches off of the match portrait, thus for awhile you may get some people that exhibit beaviors, physical features or geography that my not e a tailored as you would like. Over time as more user take the test we will be able to provide more strict results based on addtional criteria other than the test itself. Thank you for your patience why we buidl up this system.