Thank you Jeremy! You truly happiness. ;)
I was afraid to "remove" anything, since I wasn't sure what exactly to remove, but changed I changed "twocol" to "onecol" where it showed up twice in the sidebar.php.
I have my layout set to 4 columns, with the sidebar counting as one of the columns. It only shows four when the screen is opened wide enough. Before I changed the sidebar.php, I messed with the variations of layout and my image on the right did get larger with other layout options, yet there was also a white space to the right of it, about the same size as the image, so it did make sense that there was a two column thing happening.
Can you tell me what the sidebar boxes are? I have a layout option called "Boxes Sidebar Columns" and can set it to 2, 3 or 4. I thought maybe it referred to vertical space within the column, and gives me a choice of 2, 3 or 4 "boxes" to put widgets in. Is that correct?