I flew thru BOS Terminal A of couple of weeks ago and went thru the TSA line and had the same problem. I flew thru the ID check and had to wait at x-ray with all the people coming over from the other security lines that had no idea what to do. For those of us who have subjected ourselves to the background check, TSA interview and paid our fee, it was kind of (very) annoying to see other people using TSA Pre.