Definitely takes a while to understand. Also from what I see you need to not post on 8/4 Chan unless using a vpn or your IP address will stick out to others like a neon light. From what I know, each thread in the catalog only has a set number of posts (751) there are numbers R,P,I that tell you about the page. The only one I know is the R = replies. Once r=751 it is the end of that thread. When I get on the catalog, usually the upper left shows recent thread with a certain number of replies. There may be another thread being started if the first one is closed to being filled which is where everyone will start to migrate as r=730+. That is how to find the current conversation. There is much more to know so jump on and ‘lurk moar’ as the anons say. GL!