Could you post a screenshot showing this issue please, I am not sure I understand it right now.
I think what hes trying to say is that, when you type something in the console and the auto complete box comes up with similar results, if you press the down arrow to select the first item in the list, it seems to choose randomly.
For instance: http://vp-zp.com/zp/goldsrc/console.jpg, whenever I press the down arrow it should select cl_chasedist, however it puts cl_clockreset in console. Then if I press down arrow again it goes to cl_cmdrate, then cl_crosshair_color.
Hope that makes sense.
edit: This is on Windows for me, might be fine on Linux.
edit2: Up arrow also does it in reverse, goes cl_crosshair_size -> cl_corpsestay -> cl_cmdbackup -> cl_chasedist -> resets back to cl_crosshair_size and repeats.
Nothing extracted yet.
If use arrows to choose first command u cant found it in entry box, but u see it in the list