Looks like you tried to account for the angle at which the imagery was captured by moving the footprints you mapped here to the base of the buildings. On some occations you did this quite accurately but other footpritns could have been more accurately positioned. In this case since the Western walls are visible and the shadows are cast NW you can use the contrast of the shadow and wall, and ride the corner of footpritns down the edge where two walls of a building meet. You can right click and move features or press m to move selected features without having to hold left click while moving your mouse. ESRI would have been a good secondary source because it is closer to a vertical photo.
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            Published using OSMCha: https://osmcha.org/changesets/170193628
            