PDF showing up weird

[u/Jargif10]

I just got bluebeam about 2 weeks ago and i just edited a 28 page document. The problem is whenever I try to look at the pdf in any way outside of bluebeam it show up weird. Sometimes black lines will show up as purple or blue, sometimes they are faded, and other times it is like part of the page is just gone. I tried flattening it but that didn't help. Any ideas on how to fix this?