Reply signatures

Reply signatures

I have found the signatures text box in the personalize section at the top of the page, however when I add one in and try to reply to a ticket, the signature appears right at the end of the feed whereas all the time when we respond, we just type at the top of the feed. 

 Seeing as when we reply at the top and start typing it appears in a different font than if you type at the bottom so if I want a signature it makes it look odd. Firstly where is the correct place to type a response in and secondly, is there a way of changing the position of the signature on the feed?