Theme modified / Many Problems

Hi all,

i have modified the theme Elements-of-SEO and now i have some problems with the view of my blog.

For example i made a single.php which call up if the post is in a special category. If not it calls single_normal.php if it is in a special category it calls single_spielhalle.php

Among other things i have the problem that the sidebars be shown under the single post and not next to the post. This happens with different browsers.

Can anybody please take a look at my theme and help me?!

Here is the theme: https://tinyurl.com/ylskeke