We have investigated the issue , but we can't reproduce it on our side . The width and height parameters are working well and the output documents have appropriate size (2067 x 2924). Could you please share with us example of your code which you use for setting the result image settings and example of output PNG file , that we can check it with exact the same code.
Please note: if you use resolution settings instead of width and height then these settings will rewrite the width and height - please ensure that you doesn't use resolution settings.
We will wait your details and will be glad to help you .
Your Document Collaboration APIs
Follow us on LinkedIn, Twitter, Facebook and Google+