disk quota WONDERS

Ok, well.. i have my users in this location on the server

C:\user_store

or networked \\server\user_store\

now , on drive c.. i enabled quota. i go to the quota management, and i enable a 1mb quota for testuser

the user has his documents and desktop redirected to \\server\userstore\testuser\desktop and or \my documents\

i can put any amount of files on my desktop or anywhere.. idk were the actual quota is put on..

i have disallow usage after quota is reached.. any ideas??