Try turning off the "Spider URLs" option; it may be that your server cannot support it.
The other three require either a code change or a template change:
2) pp-inc.php, topmenu() function
3) sidebar-rightclose.tmpl, i think
4) You can turn off the 'category avatar' option to remove the first column and then check out the categories.tmpl template for the centering issue
Please do not PM me for support or sales questions. Thank you for your understanding.