Breaking Ties - The BlueGolf program is set up to use the USGA Rules - Appendix I #11 (c)  How to Decide Ties  (Page 125): 
An acceptable method of matching the cards is to determine the winner on the basis of the best score for the last nine holes. If the tying players have the same score for the last nine, determine the winner on the basis of the last six holes, last three holes and finally the 18th hole. If this method is used in a competition with a multiple tee start, it is recommended that the “last nine holes, last six holes, etc.” is considered to be holes 10-18, 13-18, etc.