Add a setting which will allow 'gaps' in a line of there is no data present for a given X-Axis http://community.powerbi.com/t5/Desktop/Non-continuous-line-chart-data/m-p/13746
How an organization can claim to have the premier BI tool in the industry but not even allow for gaps on a line chart is beyond me. This is like building a Ferrari but forgetting the doors.
