This is the one exception to the way that Transaction Override normally works (i.e., to override for one transaction only).  The override for Par Value was intended to allow a membership to be closed and all funds returned to the member, and some credit unions have large enough par values that it might require more than one transaction to handle the funds appropriately.  Therefore the Account Adjustment feature does NOT reset the override flag after the first transaction is posted, so that you can post additional transactions on that same account, on the assumption that the membership will ultimately be closed. 

The override will be reset at the end of the day, however, like all other override types.  Just be aware that if you don't close the account after all, the override may affect subsequent transactions that get posted that same day.