Thanks, folks - so at least I know I'm on the right track with the design now!
Christine, do you mean that the rogue apostrophes haven't vanished?
They've vamoosed on mine - possibly you need to refresh the screen?
RE: Smart quotes. It appears my computer isn't very smart (or I'm not) and I don't seem to be able to locate them on my keyboard... Ah, I remember back in the olden days of Atari and Amiga, when such things used to be automatic.