Hello and thank you for your edits.

When mapping buildings, polygon should match the exact shape of the building that it is placed on and should not be a random shape. The vast majority of the houses you mapped here are simple square shapes which aren't angled correctly with the building they're representing, and some of them are even triangular or trapezoidal in shape. If in the future you plan to map more houses and/or correct these previous edits you've made, the best way to map buildings is by carefully tracing the area of the building—making sure you have every angle of the building traced—and then pressing 'Q' on your keyboard to even it out into a clean shape.

Alternatively, there is the Rapid Editor (https://rapideditor.org/rapid). This allows you quickly add houses to the map more accurately than just spamming polygons and more quickly than painstakingly adding each building shape, however it isn't the most accurate.