When you use the numpad to writte numbers on the chat,password,etc, it does type the number, however it also changes where the number is placed:



To test/see you can go ingame and press 5 and 4, the 4 will appear before the 5.
If you press 8, it works like the up-button on directional pad,it shows the last text entered.
6 gets after the letter/number you typed, and 7 aways get as first number.

Press the numlock key on the keyboard and try again

Don't work. if i deactivate NumLock the numpad don't works.
i tested it here.

Yeah, it seems to be a bug. Thanks for letting us know.