WordPress / osClass site update

The updates that are are on the site [login to view URL] Uses osClass / wordpress backend with Twitter Bootstrap theme -Currently the items are listed 1 to a row, I would like this 2 to a row, for hom page and other pages -The Items have a property "Buy" or "Sell" against them, I wish to have this included in the listings -Currently in the search bar, there is 1 drop down for "category" which shows each category and its sub-category. I wish to seperate these and have 2 drop down boxes for both. There will need to possibly have an ajax function to update the sub-category drop down items depending on what category you select. This feature exists on the site already - at [login to view URL] (user must be logged in to see this page) It needs to be modified to work with the main page. -Currently the facebook login works but it has bugs. A user will log in and not have access straight away. I am not sure why this happens, it is a plugin , and was not working. Slight modification got it to work however users still sometimes need to log in twice before they can access. Possibly having the user re-directed to the home page after log-in with facebook is successful will solve this. Let me know if you feel you can help