I had somewhat of a breakthrough. I changed the format of the backup to just an uncompressed tarball and not only the process is now super fast (~110 seconds), but it also works perfectly fine.
The log is still not showing up everything its supposed to, I would love to fix that!
The solution does not work everytime. We write around 10 to 20 posts a day on our website that we don’t want on facebook/twitter, and I would say that at least 2 or 3 (no idea why) goes to facebook/twitter either way (the checkbox somehow gets checked).
So I’m guessing like someone said above, the solution interferes with other functions. This should really be built-in the plugin by the developers. Any news?