Random Solo not very random

In the last couple of days, I've seen the *same* stories appear on the "Random Solo" several times.

Just now, for example Giddy Up Go - The Real Story by Carla Ann showed up when I refreshed the page. It showed up about 12 hours back as well. This is the 4th or 5th time I've had a story show up again. In the last 2-3 days.

Also, some authors seem to show up rather frequently. Though this may just be because they have a lot of stories here. :-)