Why is it that sometimes test messages and / or email s sometimes open full screen, with the send button being at the the bottom left, and sometimes they open in a MINI window with a  send softkey to the left of the reading pane?

Its only troublesome sometimes because in the second scenario, that send key at the BOTTOM left is now the "close" Key and if youre not careful to be wary of this your message closes instead of sends…..