That rack has been interesting over the years. The current situation is mildly annoying (unchanged today), but for about a year a couple years ago the Zagster bikeshare maintenance crew commandeered it. They had about 6-8 bikes in and around it at any given time, and sometimes there was room for me but inevitably my machine would get knocked aside or over, got tired of fixing the scrapes and gave up on it. Then they expanded, and must have moved operations to a proper place. They would not even bother to lock them up, and I would take them on quick joy rides in the basement.
My 20" tires on my campus commuter will not fit the slats, so I park on the outside of the edges, seat post on the rack to keep the paint nice. I could move one of the bikes inward and still park, but when they would depart they would need to shove me aside. The one on the left is completely inoperable, flat tires many broken parts, and yet it moves around every once in while! It was just parked free for a time in the corner, then at another rack, and now there. Weird...