I know it's unconventional, but if you absolutely have to change a members status you can do a query.
-=[Warning]=- Only try this if you are familiar with using sql queries in vbulletin. Noobs could cause serous damage to there forum messing around with queries -=[Warning]=-
I have tried this and it has worked for me.
READ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
First things first make a backup of your database!
Then if you are using a prefix add it before "userfield" so if your forums sql prefix is "for" then it will be this "foruserfield" next replace the "X" with the new status you want to replace the old with, and then replace "Y" with the user id of the member who's status you want to change.
PHP Code:
UPDATE userfield SET vbstatus_status = 'X' WHERE userid = 'Y';
So if you want to change admins status to WTF it would look like this.
PHP Code:
UPDATE userfield SET vbstatus_status = 'WTF' WHERE userid = '1';
Alternatively you could just edit the fields using phpmyadmin.