Problem after windows recovery

When i install Snow leopard get all the drivers working and combo update/legacy kernal to the latest update then go into winRecovery and use diskpart to make the mbr active again i can no longer get it to boot into OSX. It hangs at the apple logo. If i dont update i can diskpart active and go right into snow leopard. Has anyone else encountered these problems? And yes i can reboot over and over again before i diskpart active and for some reason if i diskpart then do the updates the legacy kernal will fail at installing :\. Is this not extremely strange or am i missing something?

-also i used easybcd to edit bootloader.

EDIT: I reinstalled a couple times tonight and now everything is fine. I really don't understand what happened. But even after my 1st reinstall tonight it repeated the process. Maybe my disk has a scratch affecting it.

Mod delete if you want.