"fill blanks with 0" tick box

Check the latest dev release. I've added in some proper data validation and recombination routines which replaces the crude sort() which I used previously.

Thanks, It works great now. Do you think you could allow it to accept blank spaces in the chart data? when charting data, if a space is left empty the chart wont render and will come up with an error. I'm doing charts with spending in 2009, so as you can imagine, i have a lot of data that isnt collected and I have to put a "0" in the space in order for the chart to render.

seems fair enough. I'll look into it. I thinking of having a checkbox on the edit form which you can tick to say "fill blanks with 0"

Done.