Hi Mick, thanks for your reply. Yes, there should be a function to re-order them, but there isn't (or at least, I haven't found one).
Playmemories studio seems to be for the PS3, which I don't have.
I'm giving up on Playmemories online - far too clunky. I'll stick with my ISP's (1&1) online photo album.
Cheers,
Alan