Hi lexdiver,
This is the block of the template, you can select the position that you want to use.
You can change from the Sidebar-2 to the sidebar-1 position. Also, the sidebar-2 position is not floating over the main content it's an error about the display in the backend and unaffected to the frontend.
When you use this block it will show beside the "mast-content" section.
And this is the result when changing between sidebar-2 and sidebar-1:
Note: Please don't create the module for the position you don't want to use, and change the position for the block.
Hope this help!