its because you have an extremely narrow width.. you will need to adjust the column widths to fit in such a cramped space…

first, make your own sp theme… http://codex.simple-press.com/codex/themes/theme-basics/creating-a-theme/

then go into your sp theme, and adjust the template file for topic view, spTopicView.php…  you will see columns for the post…  15% and 84%…  just nudge the 84% down until it fits – 82 or 83% seems to work…

I figured out a solution thanks for the reply

thanks for the update…