Maybe this is a more straightforward question that I think, but I'm not sure what you are asking. I saw your post at the end of page 58, I clicked Reply, I get a page requiring my name/password, it shows subject, person who started the thread, and my choice whether to reply just to you or the thread (topic) in general. Then I type in this message box and finally click Post Message button at bottom.
I can't answer your couch problem. Ours is ok, many others are both better and worse. I'd suggest you tour your available RV dealers and note who makes the comfortable couches you might sit it. I sat on one in a Kodiak B+ that was pretty nice. All I recall is that it was made in Canada, so that's no help.
If you need more help, call out to someone else!