Sorry for the long delay in replying!
I now have a (possibly) similar problem with a different photo on www.collischoralsingers.org. The photo (Sebastian Valentine) was supplied to me in portrait orientation. When I load it into the assets library it appears as landscape orientation. I can see no way of changing it back.
Thanks.
I have today loaded the photo (in the wrong orientation) onto the page where I want it to appear - Musicians - so it can be seen as a preview but not on the live website.