ORIGINAL: goirish
It just seems that the size of the ailerons are hugh. Not only that but they are very thick at the TE of the wing and LE of the ailerons.
Real Cubs had big "barn door" ailerons. The kit is 1/4 scale so parts of the model will be masive as well. I personally think it's kind of cool.
Getting the plans and instruction book was definitely a good idea. Whenever I personally try to guess at something on my own, I usually end up being wrong. You should have a really nice airplane when you get it finsihed.
As for building the ailerons with the wing, it is pretty common. I have a Top-flite P-47 kit and it isn;t done quite like this one but the ailerons are framed as part of the wing structure then cut free along the LE during the build process.