The last ex command not showing up automatically

Hi, So far the inconvenience thing I have noticed about ex command in Evil compared with that in Vimpulse is that when I typed ":" the last command was not showing up automatcally. This is not convenient because I sometimes use ":w RET" instead of "C-x C-s" to save the buffer. If the "w" was already there I could have typed ": RET" to save the buffer which saved one key stroke. York