buying Eye of the North in a reatail store?

if a purshased the preorder in the online store, but prior to that i had put 5 dollars down in preorder at a gamestop, cause they dropped the bomb in the fact they did not give me or email and preorder keys, now i get a call saying the full game is in at the store, i can go pick it up, and only have to pay the price minus the 5 dollars that i put down for the preorder, my, question is am i required to buy the full game on the online store, since i finally got the preorder thru the online store or can i get the hard box set at the store, i dont want to looose my preorder bonus, and all i did doing the preview?

No. Buying the preorder in the store does not commit you to buying the full game.

Likewise you're not commited to buying it from the retail store either. In reality seeing as they didn't provide you with the pre order pack you could ask them for your money back.

You're free to buy the game wherever you want.

Whichever way you choose to buy it, you won't lose your pre order bonuses or the progress you made.