On the graphics, it looks like the density changes for the rest of the dates whenever the identified bot families show up (creating the differently colored colu

On the graphics, it looks like the density changes for the rest of the dates whenever the identified bot families show up (creating the differently colored columns). When the identified bot families stop, the density changes back. Is that an artifact of how you're displaying it, or is it an indication that the followers before/after are also bots, but they've been mixed with bots created at other dates, where the bot families identified are just the low quality (non-mixed) bot families?