Well it is hard to remember every single option since there is alot but let me explain how I think you mean and you can clarify.
1. Our program is not going to change the orientation of an image that would not be something any program I know of does as orientation affects the aspect ratio. The photo is going to be whatever orientation it is.
You can definately click an image and the large popup appear. 023 - My Photo Gallery
The problem is all photos you have uploaded are smaller than your medium trigger of 600. I changed your max image dimensions down to 1024 for you. If you want to click an image to see the large there has to be a large image meaning it has to be over your medium threshold so a medium is created.
2. You can create a category under admin edit categories and set the rating type to vote versus rating and you can then view your category to set the voting options. At present I show you have created not one category yet. You seem to have mastered the notion of personal albums but again personal albums are just your albums not for other people to upload to.
3. I can remove those arrows they are something new they can not be shown outside the window not without recoding anything and support does not cover code alterations.