I had a few random lines on my illustrator file so i Decided to delete them.
Now: When I open this file on illustrator, the lines are gone - perfect. But when I saved this exact file as a PDF, then opened the PDF separately from illustrator these lines were back.
I went back to the original AI file to discover the lines weren't there. Then I saved it again as a PDF to discover they came back.
Why is the PDF showing lines which are CLEARLY not on the original AI file?