Currently if someone starts a stream late at night and goes past midnight it will show on the dashboard as two separate streams and brings down the average monthly viewers. For an overnight streamer that starts at 11:00pm the dashboard counts 11:00pm-12:00am as one day and the rest of the stream as a separate day. Ao for the "first day" of the stream week the statistics show only the average viewers for one hour of the stream. A lot of viewers show up to a stream a bit later and the average number of views for the stream is higher than what would be shown on the dashboard per day. Being an overnight streamer can bring average numbers down and therefore possibly make it seem like someone doesn't have as many viewers as they actually do when looking at something such as a 30 day average.
For those who start streaming late at night and into the next day this makes it harder to accurately track average view counts.