graph breaks up after send mailing

[ssoulless]

Hello, Im not sure why is this issue, I created a mailing and then try to send it, it sent in the normal fashion the emails, but wanted to check the graph and it is not appearing (check attachment)

I thought this was some javascript conflict but then I tried witht he test app at https://github.com/Sology/maily_testapp

well I isntalled it, added the seed data, and tried sending the mailing, it sent but the graph dissapeared too...

The javascript console chrome is showing the following message

Uncaught series data needs to be sorted on x values for series name: Delivered