Window does not keep its top frame width

[pittsburgh_urbanite]

I created a window using the Window family editor, then used Create Extrusion > Create , then placed Reference Planes, dimensioned the frame widths, then dimensioned the mullions equally, and locked the dimensions, then picked lines, offset them from the reference planes and trimmed the lines to create the mullions. This all worked, and when I loaded the window into the project, it loads ion fine at the dimensions/window size defined in the Family Editor, but if I change the window height in the project using Edit Type, the top frame widens and does not keep its width as defined in the Window Family editor. I'm not sure what I missed, but I could use some advice. The window family file is attached. Thanks.

[shyock]

You need to align correctly the reference planes.

You can change the parameters value into the family editor to see what is happening when you change the dimension in the model.

[pittsburgh_urbanite]

shyock:

Thanks, But still have an issue. In Family Editor, after I aligned the top of window reference plane with the top line of the window extrusion, then saved and loaded into project, when I Edited the window height using edit, the muntins did not stretch with the taller window frame - see image. In addition, in the model, it says that the constraints for the window are no longer satisfied. This is excruciating. Is there a GOOD, comprehensive window family tutorial that I can watch to help figure this one out? I looked at multiple tutorails, but none of them tell me all that I need to know. Or should I just go ahead and create a new window family for every different size window that I use?