Help: x and y acting strange in mc's

i got a problem,
when i draw a rectangle, hit F8 to make a MC, set the centerpoint
to left top… than edit the mc, the rectangle should be on 0,0 but its not
its centered… it happens al the time (not only with drawn rectangles,
also with bitmaps etc)

probably its some setting of some kind but can’t find it and driving me nuts

thanks
mels