Ok, if i make new project and set position to poDefault, width 200, height 200, i get form that is normal in that small area, but rest of the big form is black. It became 1200x700 or so in size.
I don't know if that's intended or bug, but at least it should paint itself.
I always use poDesigned or poScreenCenter. poDesigned only if i want to manually move the form on startup, poScreenCenter would mess with that. poDesktopCenter does awkward thing on multimonitor computers i've heard.