I've seen that issue as well 3ft windows get framed 30" 4ft , windows 40" etc.....  so I use a modified System like Glen showed, it won't change existing windows as noted ( new windows will ) but if setup in your Template it does..... the Label will ignore the Width and Height in the Schedule if it is in the Windows Default Properties already.   *note.... the Schedule Number does not show until you place a Schedule in Plan. And it will double line the Schedule if you Format the Default