Hi Struico,
Thank you for your interest in syncfusion products.
I am afraid that we are not able to reproduce the issue. Sample to show the last page as first page is placed in the link below:
forum97438_1-1601702577.zipI have placed the output document in the link below:
portrait1-80184928.zipPlease try this and if still the issue exist, kindly provide us the Essential Pdf version you are using. This will help us in further investigation.
Regards,
Priyadharshini