I just received this pocket knife a couple of days ago . I am a bit confused though because it is advertised that one can open it with only one hand . So at the side of the knife is a little bar, which I assume is the locking mechanism, I slide that to the other side and then press on the long bar and the knife comes out a tiny bit . I then have to use my other hand to pull open the knife and it locks into the open position , so I have to use two hands to open it . So why can't I open it with one hand ? Is this how it is supposed to be or am I doing something wrong ?