Commands with Chat

What I expected to happen was...:
When I type a Command I expect the error to show up if I typed it wrong. Example: I type /help and normal can see the list but when I do this I have to hit t again just to see the help list.

What actually happened was...:
I hit t to open chat
I type a command i.e /help
I have to then re-hit t to see the list of help