As long as your front wheel tracks properly in the plane of the frame, and you aren't crabbing down the road when you ride, then I wouldn't worry about it. It's not uncommon for forks with separate crowns and fork legs on lower end bikes like the Flite 100 (aka Kilo TT) to be a little off, but it's normally just a cosmetic issue. As to your doing something to cause this, well, unless you had a front end collision or are jumping curbs a lot then I'd say not. Normal riding won't bend a fork.