Zend certified PHP/Magento developer

LibreOffice Calc arbitrarily crops first and last two data points

I’m currently using LibreOffice that comes bundled with Tails 4.5. When creating a chart from a simple XY dataset, the program just arbitrarily chops away the first and last few datapoints. I don’t know what the programmer for this bit was thinking (maybe “Yeah, lemme just cut your data left and right, because why not?!”), but I would like to restore the borders of the chart and can’t find an option for this. Anyone knows what to do?