Chronic Window Sizing, Positioning, & Configuring

Why after decades of Windows development won't opened windows maintain their set positions but instead continue to revert to other positions? In the case of IE the window size does remain a constant but something continues to upset its position. The position upset is not caused by closing the first instance of a window down first before other instances of IE for instance--that always upsets the first instance position of the window. I think there are many things that come along more important to spend man-hours on fixing but ignoring a real solution to something this obvious for so long a time I cannot condone. Size and position of a primary window's location ought to stick as sure as one's Home Page remains what you have set for it.

Equally annoying and unexplained is why some windows like MSConfig that can display a number of columns of data depending on what you are looking at in it have never been able to resize (or position) at all to properly display the data.
For me these are two really disgusting oversights. I wonder why, if Windows has a Registry that no one seems to care how it gets used or how large it grows, it can't be used to lock in window locations, sizing, expansion, configuration, etc. data, and keep these window parameters from reverting back to something less?