Using the Me-Quran العثماني font, in Surat Yosuf, verse 11 on the word "تأمنا" there is an odd dot between the "م" and the "ن" that makes it seem like there are two "ن".

Assalamu ‘Alaikum Wa Rahmatullah, JazakAllahu Khairan for bringing the issue to our attention. We will review the content and make the necessary corrections, Insha’Allah. Please keep sharing such suggestions with us. It will help us to fix the mistakes gradually, Insha’Allah.