Is there a limit to the number of data points on a pivot chart graph?

Hi,

My graph will only include 32 points. I have to filter out dates to get more current dates to show. I am graphing the sum of 20 occurances, 3 times per day, in 7 categories.

LibreOffice Calc Version: 4.1.5.3 Build ID: 410m0(Build:3)

Ubuntu 12.104 LTS