Thats a shame.
Im not sure i will bother trying to find all the Holocrons again as it was the least fun part of the game!
I found out that if i start a new game all the Holocrons are back in place, so i might level up to the max and then go back through on easy to find them all again. Booo Hooo.
Funny thing is that i previously owned the PS3 version of the game.
I ended up playing through it again once i had unlocked all my force powers and enjoying it even more... and then i thought that if i traded it in for the 360 version i would at least have achievements to give me reward for playing it so much lol.
Shame they didn't put trophies in the PS3 version though as i think i did prefer it on that console.
I know some people don't get trophies or achievements... but in my opinion they really do add so much to a game and increase its replay value.