Mapping drive using GPO does not obey to Item-level targeting

Question

Dear all,
We are mapping drive using Item-level targeting based on security group (User Configuration > Preferences > Windows Settings > Drive Maps) with the following settings:
Action: Replace
Run in logged-on user's security context: <Checked>
Item-level targeting: <Checked>
So if user is member of Group_X then he/she will have drive X mapped on his computer.
Problem now is that (even if reconnect is unchecked), drive will stay mapped when we remove a user from this group.
Is this the normal behavior ? did I missed something ?
or even worst, imho, should I add a new drive properties which would say to delete the drive if user does not belong to the relevant group ?
-> double targeting query for a single drive
-> what's the point of Replace / Reconnect then ?
Thanks in advance for your opinions!
/behd
[EDIT: Forgot to specify Win2008R2 AD, Win7 Pro clients but doubt that it'll be of any interest for this case]

Answer 1

Drive mapping should not remain after you remove the user from the group.
What I suspect is, that at first, the "reconnect" was checked then the user got the policy and tattooed the reconnect value. after that it doesn't matter that "reconnect" was removed.
Try the following:
Logon with test user, make sure no drive mapping exist (disconnect if necessary).
Create a new policy with drive map - make sure reconnect is not checked, and apply it for the test user.
Make sure no other drive mapping policy exist for that user.
Login with the test user, make sure drive was mapped.
Log off that user, remove it from the group, wait for AD replication and log on again (sometimes another log off \ log on required).  
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