Hi
1. Message posting.
There are two methods to post a new message, one using "new thread" button and the other using "post reply" button. As soon as you post the message, you are taken to your post. If you want to preview your post before saving it, there is also a "preview" button next to the "submit" button.
I am not sure what you mean by feedback. Please explain.
2. As regards 500 posts, that was the maximum limit set for post searches.
I have increased it to a 1000. Increasing this number increases the load on the server. But if this works fine, we can increase it further.
Regards