Are super- / sub- lists involved?  Do you have multiple subscriptions?

At 06:19 02/05/2000 Saturday , rellieb-jean wrote:
 >Hello ,
 >
 >I am subscribed to a list, and if I send a
 >SET Baba Topics: -All
 >
 >and then later
 >Query Baba
 >
 >I get
 >The topics you subscribe to are: None
 >
 >And yet, if someone sends a message to topic ALL:
 >
 >I still get that message.
 >So is it actually impossible to turn off ALL: