Main sidebar widgets being added at bottom of Posts

My website is www.cranburypubliclibrary.org I currently have 4 widgets located in the Main Sidebar. When I try to add any more widgets they get put at the bottom of the posts across the width of the page instead of in the sidebar. I've asked about the sidebar having a limit before and was told to check if any plugins were causing it. But I have deactivated each plugin one by one and found none of them to make a difference in the sidebar. If you go to my webpage and scroll down you will see a text widget with a title of "Special Resources" and two linked images. I have this widget placed in the Main Sidebar on the widget page but it appears near the footer. This happens when I try to add any additional widgets. Please advise.