When a date is entered in the Graduation Year on the Education/Schools relationship, it will default to the four digit year for 2030 and after; even if the option for the two did year is selected under Config>Business Rules>Alumni Options
Download and install the latest patch which contains all fixes from previous patches. If you are running an older version, download and install the latest version and then the patch.
Steps to Duplicate
1. Select Config>Business Rules>Alumni Rules and set class format to YY 2. Open a constituent record>Relationship>Education/Schools 3. Enter a date 2030 or after 4. Save the change on the record 5. Re-enter the record, Date will default to the four digit date. 6. Years 2029 and before will appear as two digits