Universal - Chart - Date bug .. why is it showing timestamp instead of date?

Hi. 

I created a chart for the past 2 months..  and a few things:

• I have a date column, which is shown as a timestamp (date_time).. why? Looks like a bug. 
• When you create a chart, the SF creates date groups.. these don't work with the Universal it appears.. it just gives errors when you want to use them.