Duplicate Boot entries

#1
Booting Windows 10 Tech Preview (TP) and windows 8.1. issue found was that the upgrade from win 7 to win 10 TP forced EasyBCD to make win 10 TP the default. On reboot instead of 2 options I have 8.1 shown twice. Edit of EasyBCD shows only 2 entries. Any views as to what's happened and, apart uninstalling and re-installing program how to put right.