Marking is not working on lds.org

I'm studying a conference talk for a lesson I'm teaching and as I read I mark the passages I want to highlight in my lesson. Each time I mark a paragraph it unmarks the previous passages. I never have trouble with this on Gospel Library but on lds.org have often run into this.

Are you using the older content pages, or the "new experience" Gospel Library Online pages, on LDS.org?