Sorry, I explained badly in the above post.
Things go this way: a Member registers and board soft puts him in Registered users Group, after one week if the new member doesn't post he's moved to Inactive users Group.
He remains there till he doesn't post, in this case he goes to Verified users Group. If he doesn't post for 455 days, board soft moves him to Banned users Group.
Board soft will move him to Banned users Group as soon as he login again after these 455 days of inactivity, but the script needs the user login at least once or twice again, because Vbulletin cron job doesn't run all day long, but at scheduled set hours.

PS: every Inactive User has a notice in forum header about it.