Believe it or not I have the exact same problem. Rib R2 just isn't right. I tacked all of my ribs to the wing template. Exactly 90 degrees in perfect alignment with the plans. When I eyed up the TE of the Ail. I could see that something just wasn't right. R2 was sitting too low. What I did was drew a centerline on rib 2 and set it in place so that the measurements were the same from LE to TE. I then ran a straight edge from R2 to R10 at the TE. of the ailerons. I clamped all the ribs to the straight edge. As far as I can tell, as long as the end ribs are sitting parallel to the table and all the rest are straight in line with these 2 ribs then everything should be fine.. Mine was off by 5MM. I checked it with the other R2 thinking that maybe it was just a coincedence but both R2 are the exact same size. I wish I took a picture. My only hope is that when I turn the wing over to finish off the top everything is lined up.
Something tells me that the second wing will have the same troubles. If so, I will post pics early on so maaybe Mike can tell me whats going wrong.

EDIT: I will note that the wing tube phenolic was a perfect fit.

Edit 2. Outssider. My suggestion is (mike correct me if I am wrong) mark a center line on rib R2. Make sure that line is parallel to your building board. If it isn't make adjustments as necessary. I believe that is the most important part.