I have this table alignment error in all the post pages. This is after the upgrade from v4 to v5.
Another tweaking question. How do I hide the post listing in the topic submission page?
A lot of users complain that they have to scroll down to page to submit a post.
It looks like you are using the default SP theme in a narrow width column. When that happens it causes the display to look like that. There are a couple things you can do. You can increase the page width for the forums in your WP page settings, you can try the Stacked theme (available on the downloads page here), or you can edit your Simple:Press theme to fit better into the area allowed.
If you choose to edit the theme then you should create a custom theme so the changes don’t get overwritten on future updates.
On the new post display it should take them to the bottom of the page to the edit box automatically. It may not be doing so now with the display issue you have but once that’s fixed try it and see if it works like it should.