One thing I learned early on is that you can take bd's dimensional specs with a grain of salt. Sometimes they are correct and sometimes they are not. In the case of the Kilo WT, I think bd just carelessly transfered some of the specs from the Kilo TT to the Kilo WT, even though the two frames use a completely different tubeset. The Kilo TT does indeed use a 26.8mm diameter seatpost, so that number was used in the description of the Kilo WT. I almost bought a 26.8mm seatpost for my Kilo WT, until a forum member pointed out that it was actually 27.2mm, and when I removed the seatpost it was indeed stamped 27.2 on the bottom. If you actually received the original bike with a 26.8mm seatpost installed, then it's no surprise that the frame would be damaged when the seat binder bolt was tightened.

You can also get incorrect info if you email bd about specs. I inquired as the stem length and bar width on a size 43cm Motobecane Messenger, and bd replied 90mm and 400mm respectively. When the bike arrived, the actual dimensions were 120mm and 460mm, which were way too big for me.

BD quality is hit or miss, and this is the main difference between their bikes and more expensive name brands. In my case the problems were minor, such as a stripped seat binder bolt and rear dropout spacing that was off by nearly 5mm. I didn't bother to call bd, and simply found another M6 bolt in my parts bin and cold set the rear dropouts back to 120mm.