Blue boxes of random sizes when selecting text printed from the internet

I am befuddled.  My assistant prints the dockets from cases from the internet to pdf.  I then review them and sometimes want to copy text to other documents.  Sometimes I get wildly random boxes of different sizes (usually several inches tall where I would expect just the line or paragraph of highlighted texts.  The problem is hard to describeand s o I havent found much.  Any insight woul be appreciated.  Here is a public record example.