Ok, a couple of pointers here:
1. Visitor Panel doesn't seem to display in the Sidebar at all;
2. When Floating Navbar is enabled, and Enable Logo in Navigation is checked, scrolling causes them to jump right - I presume you have different widths applied for the topnav when floating and when not? EDIT: Figured this one out - uncheck "Enable Floating Logo inside Nav Bar"
3. When topnav is applied to the sidebar, it still leaves a blank space space reserved for the topnav in both desktop and mobile versions