As for sizing, it makes no sense at all. When I first returned to LA I bought some polo shirts (I LOVE polo shirts) from Land's End in my usual size, a SMALL. I was surprised at just how small they were. The next time I purchased MEDIUMs. The MEDIUMs are actually smaller than some SMALLs I have from several years ago.
I think Chico's had the right idea. They created their own sizing system. Inconvenient at first, but the old system really isn't helping customers.