Allen,
I see your issue and please raise a ticket for this so that we can get you a patch. I think you're also using an older library of SAP UI5 as the chart should have the lines overlapping so be sure to include your Components.xls from here in your ticket in order to speed up processing:
http://<server:port>/nwa/sysinfo
Select the Components Info tab and the press the Export to Spreadsheet button. Also, be sure to reference this SCN post.
Sam