As of right now, I completely went back and uploaded the backup files to set everything back to BEFORE I even integrated the site. One of the files, sections.php was a good backup file long before everything went crazy.
After back-tracking to before the SMF Integration MOD, I then upload the files for the Integration MOD. Everything seems back to normal, and currently not throwing any errors or warnings. I am going to try to integrate this whole thing again. I will be much more careful this time around, since I have noticed these errors drastically hurt the hits I was getting over tonight by about 50% less.
Though this might not have any connection to the problems about forum posts inclusion, directly after I did the SMF Integration MOD, it shows I have a database error (clearly within the SMF database). I have taken screen captures of both my 4images cPanel, and also in phpMyAdmin. It's a long shot, but I figured maybe this may be part of some problem??? To be honest, I haven't seen any kind of errors related to it.