I don't think there is an issue with the software Alex, there is a members name that appears with the word banned underneath it that's because he is banned and was since the new site started. I assume that if anyone else is banned then it will also appear under their name. On the old site there were no rankings etc so the junior / senior member stuff is new to this site, as is the word banned that did not appear on the old site either so did not carry over.
So PF to answer your question Stone is right, I can't believe I just wrote that!, anyway a members status is governed by how many posts he has made or if if he has been banned, it will clearly indicate his status under his name what it is.
John