The shade you received measures 48" wide and fits the window width correctly, but only extends down to 31" instead of the ordered 40" height. This could be due to receiving a shade with incorrect height, a manufacturing error, or an installation issue such as an adjustable stop on the cord. We recommend checking the label for height specifications and gently pulling the shade to its full length. If it still does not reach 40", it is likely a fulfillment error. Please provide your order number and a photo of the fully extended shade for verification. Regarding the second shade, it can be customized to 36" long by 48" wide as you requested. If you have not yet received it, please let us know so we can ensure it is made correctly.