SAS populates the SMFTIME field of the SAS user SMF record using the system TIME() macro. For sites that use date-modifying products that intercept SVC 11 (TIME macro) calls, the SMFTIME field contains the modified datetime and not the actual system datetime.
Toggling the setting for the SAS system option SVC11SCREEN has no effect on this because SAS still uses the TIME() macro to set the SMFTIME field.