tehe I did the EXACT same thing. I bought some charm packs for the first time ever, and figured out that one pack would make abut a 30x27 quilt (way too small), so I just doubled it to 60x53. Doubled size means double the charm packs right? So I bought 2 and went on my way. Started sewing and realized (ever so slowly) that doubled width and height means 4 times the number of charms .... not 2!! I needed 4 packs for the size I wanted, so now I am stuck trying to figure out how to make a good size quilt with 2 Love U charm packs because they were the last 2 in my LQS and I don't want to pay shipping to just get two more!! LOL
So you are TOTALLY not alone.
Cheers!
Rachel