I haven't PM'd VFF yet - given the avalanche of problems he/she was bombarded with on their return to the board, I was reluctant to add yet another to the pile!!! Especially for something which may have just been a "quirk" of some kind rather than a major issue such as double-charging etc. I did mention it in a post in the initial thread VFF started to say they were back on the board, but did not get a reply to the post, so I assume they were pretty flat out dealing with everything else and probably didn't even see the post.
Judging by Fruitcake's post, it seems the issue may now be fixed. I might wait to see whether anyone else still experiences the same problem before raising it with VFF. It's my first time flying J (and shelling out the hard-earned in order to do so!), so it was a quite disappointing not being able to select seats for those sectors when booking. I've been waiting for things to slow down a bit with the volume of calls to the GCC before ringing them to see if I can do seat selection ....