Zenworks - Grace logins use

Hi,

I would like to know if anyone is experiencing this problem :

While users have their workstations locked, Zenworks seems to use graces logins when the user password is expired.

Our problem is that some passwords expire during week ends and when the user come back to work his account is locked because Zenworks used drained all his grace logins.

Is that a bug ? Or is this a setting that we can change to prevent this behavior ?

Thank you !

Antonin.