I noticed something very odd happening with my (non) smart lists when I import a CSV. I started with ~18k rows in a CSV, and after I imported this into a non-smart list the number of leads I get in Marketo is correct. After a few min I checked back at the list and now it's suddenly ~17k leads, then after about 5min it's down to ~14k. Does anyone know what's causing this? Is Marketo automatically trimming the list for some unknown reason? If it is, what leads are getting trimmed?