unknown desks appear on my account

I have for several years had unknown users on my accounts using up desks.  In the past I have had to use an online help agent remove them.  I can now remove them myself as of yesterday.  Yesterday I removed 4 from my Internet Security account and Antivirus accounts.  And changed my password. Today there appeared two desks used again, one on each account.

Why is this happening?  Has anyone had this experience?