Selection Problem

I came across what I believe is a bug in the selection behavior. I recall performing a similar operation in the past and not having this behavior.

I was going through my library today and catching up on building some collections. We frequent Disney World often. So I usually start by just going thorugh and selecting those photos and getting them out of the way. How I could perform this prevsiouly, and what is standard Mac behavior, is I would select a photo then shift select the last photo in that group. Scroll to the next photo that would go with that collection. Command click to select that single photo, then shift click to select the last photo in that group. What this should do is give me 2 groups of photos, with a break in the middle. 

What is happening is the final shift click is causing everything from the first selected photo in the first group through the final photo being shift clicked to be selected. The issue is that this is causing all the photos in the gap between selections to be selected. 

I understand that Windows and Mac have slightly different default behavior around how this works, but Lightroom is currently matching neither. Unexpectidly selecting a large group of photos that had been skipped over and may no longer even be on screen could lead to some fairly serious mistakes.