alright, so i went to the lbs and right when the guy looked at it, he told me that i needed a spacer, so thats what i got. I did inquire whether it was a probmem with the alignment of the frame or not and he told me that fitting a spacer on it would be the quick and sure way of fixing the problem. It would have been too much to measure the alignment, taking out the parts, then putting it on a table and measure it and all. Frankly, i myself didnt really want to pay for all that, and putting a spacer on it did sounded like a pretty good idea. anyway, thats what i'm gonna settle with.

I also asked him if this problem ever occured (im sure that im not the only one with this setup before), and he told me that these things just happens sometimes.

thank you all for your comments though.