Why do my posts keep getting deleted after 15 minutes?

I am curious as to why the thread I submitted was deleted. :/

Whoa there, hold on a second! This isn't really how you file an appeal. You've gotta give us some actual context—let us know exactly which topic or topics you're talking about and which specific PDF you're looking at. Once you lay that out for us, we'll be more than happy to jump in and help you figure it out.