Thanks for mapping on this project.
Please square each rectangular building with the Q key while it is selected
(41 out of 299 )
Buildings are often not correct mapped. Especial the high rise buildings and buildings which shows their sideviews  as well. Check this footage how to map these buildings https://drive.google.com/file/d/13RTwH7sChRWrG5bIjysF2ripBgh3F5l4/view?usp=sharing 

Best regards