Why is this happening? Incorrect Item Display?

Trying to play around with the "Floating Menu" stuff.. but its super buggy, which is disappointing..

Why is this happening when I add a new item, and set it's position to 'Absolute' ..

if you want to place all items manually by providing the coordinates you need to set the menu's Item / Positioning Mode to "Manual Positioning via XY Coordinates":

The option you chose can also be used, but requires at least one auto-positioned item.

It is..

I'll be back on my Mac later to check, I would assume the issue fixes itself once you add a second item!