In TimeChart, if we set the time duration as one week i.e., 7 days the data is showing for 10 days. In case of reducing chart width by adding another chart in the same row, It is showing 7 days. So we have observed that display period property is depending on available width for the chart. We have been added the below properties.
initialDisplayPeriod : 7 days
initialDisplayUnit: 1 day
Please let me know if you have any questions on this.