Directory Questions: Categories and Paypal

(1) How do I display one category per page? Check it out: http://www.freemexicowifi.com/pv. I want to have the subcategories for "drink""eat""stay""shop""relax""play" - all in the subnav, so that each of the pages then only has those listings. Possible?

(2) Is payment for unlimited listings? I just went through the sign-up process, and it all went well. However, it then seems I can add as many listings as I want. Is the payment for access to add listings or is per listing? What am I missing?

(3) I'm sure i'll find it in the code, but man is there a lot of white space on Step 3 in Safari.......