for instance
The source data contains events which occured Tuesday 1st, Wednesday 2nd and Friday 4th. There is no data for the other dates
When i make the chart it includes the dates which are not in the table e.g. Thursday 3rd, Saturday 6th.
Now because the chart contains data over a 3 month period and i've only got events recorded against 3 days of the week, each date shows up on the chart which makes it very long given the fact that over half of it is irrelevant.
Hope that helps