Currently when using the base theme you cannot place vendor amenities symetrically on the floor plate graphic to match the mainframe dispenser in the main entrance of your base. That is how the one in the main entrance is. The one on the second floor however looks like this. As you can see it is currently impossible to place any of the vending machines dead center on the floor plate graphic to match the one in the main entrance. Could you please center the pink marker?
There's a similar issue in the ancient theme as well. I'm thinking it's the exact same spot shown in the above image, but in the other theme variant.