File Selection Behavior (Shift + Right or Left)

With all options under Interface -> Selection disabled, I encounter this behavior:
 
Scroll to the bottom of any folder and select the last photo. Hold down shift and press left key, selecting several photos. Let go of shift. Press left twice. Hold down shift and press left twice.
 
Expected Behavior: After letting go of shift key, pressing left twice, and selecting two new photos, I expect only those two photos to be selected.
Actual Behavior: All photos from the bottom of the list to the last two photos are selected.