Thank you very much for the screenshot, so I understood it correctly!
The Leaf Size number is equivalent to Leaf Dimensions in INT library (as the diagram under it suggests). But we can see that it might be misleading, when there are double doors or the doors are asymmetrical.
Thus, I entered a request to the development to fix it in the US Library.
I'm very sorry for the inconvenience! Please let me know if you have any questions!