Yes, there really is a slogan "If there's time to lean, there's time to clean." When your department isn't busy, you'll find yourself dusting, straightening, stocking, and more for hours on end. It's considered shameful to be leaning on your desk for even 5 minutes.
Also, Menards practices an archaic closing method. If you're supposed to close, you'll be scheduled till 10, but often kept as late as 11. It doesn't matter if you're done with your work. If anyone at all is working, you will be there.
There's also an extremely poor interdepartment relations setup. Departments are rivals and often avoid helping each other unless it is convenient.