OK, so I've finally found out how to load pictures into the gallery - and now how to load them up with the right "orientation", so I can do it correctly for future pictures and posts.
BUT - I haven't found a way to correct the images in my previous post, when the post doesn't have a "modify" option by I also can't seem to see a way to delete the original incorrect orientation photo's from the gallery.
Hopefully someone help with instructions for this.
Cheers all.