How did it get this way? Did you spill something on the keyboard?
The keyboard is organized in rows and columns, with a wire for each row and a wire for each column. When you press a key, it connects together the row wire and the column wire under that key.
In your case, there is a short circuit in your keyboard between the 2WSX column and the 3EDC column, so when you press a key in either column, you get the key next to it. The short circuit is probably in the keyboard, and you will probably have to replace it.