That is the way it is in blogger! However, there is another way. Right click the uploaded photo - cut and then paste where you want it to be. As far as side by side photos, you have a choice on the uploading wizard - left, center, right. Depending on the photo size - and its padding, you may be able to place them side by side. This is a trial and error method - unless you can handle HTML codes.
Word of caution:
You need to watch your photo size too, as the sidebar can be pushed away and 'disappear' to the bottom of your page!