Sidebar and main content not flowing on page correctly

I have a page where I created a group containing two block elements. The left element is intended to be a sidebar so I gave it the position name - 'position-blogsidebar'. The right element is the blog contents and has a position name - 'position-blogcontent'. When the page is outputted, the content element gets pushed down depending on how items are in the sidebar. How do I get the sidebar contents to stay fixed or at least in line with the blog contents items? I have attached two screenshots - 1) the layout from the edit menu, and 2) the ouput. Note - within Joomla, I am using an extension called Raxo All-Pro as modules for these two positions.

Thank you,

Tim