Finlay figured it out. It's called a Display Splitter and it comes with the Dell PremierCollor app. It can be disabled by right clicking on the icon in the system tray.
I have an XPS 15 9550 with Windows 10. There is a feature I don't even know how it's called or if it's a Windows feature. When trying to move a window, a hover appears that 'helps' place the window in an area of the screen. What is this feature and how does one turn it off? Edit: It is not snap assist, I turned that feature off. Initially I added a screen print to the post, this time I attached it a .jpeg. Please check attachment. I appreciate the suggestions.
XPS 15 window placement hover