I just updated to 3.5.8.... the problem still persists....
further, I encountered another problem. When there is no need for scrollbar, I have again the same email interface behaving differently in two different scenes! In one scene, I can see the scroll bar even if it is not needed (emailScene02.k.jpg). And in another scene, it works fine (emailScene01.jpg). They are the same interface I just copied and pasted from one scene to another...

The scrollview feature seems quite temperamental! or is it me not understanding it fully??